Young sunflowers face the sun as it rises in the east and follow it across the sky until it sets in the west. Why does this happen? A team of scientists has finally been able to figure{#blank#}1{#/blank#} how and why young sunflowers move.

    Older sunflowers always face east. However, as it{#blank#}2{#/blank#}(turn) out, an internal（内部的）clock helps young sunflowers track the sun so that they can grow better. US biologist Stacey Harmer and her colleagues had it{#blank#}3{#/blank#}(explain) in a recent paper published in the journal Science on Aug. 5.

    {#blank#}4{#/blank#}(depend) on the time of day, certain growth genes seem to work to different degrees on different{#blank#}5{#/blank#}(side) of young sunflowers' stems（茎）. The east side of their stems grows faster during{#blank#}6{#/blank#}day, causing the stems to {#blank#}7{#/blank#}(gradual) bend from east to west. The west side grows faster at night, preparing them for the next morning.

    All this move is highly{#blank#}8{#/blank#}(benefit) to sunflowers. The team found that flowers kept away from the sun had leaves{#blank#}9{#/blank#}were 10 percent smaller on average. According to Harmer, sunflowers which{#blank#}10{#/blank#} (face) with the sun receive more bees and other insects because they like warm flowers.

    As a kid I disliked most vegetables. My daily meal consisted {#blank#}1{#/blank#} sugary cereal (谷类食物)in the mornings with whole milk, bread with butter for lunch along with chips, and a plate of white rice with chicken for dinner with either soda {#blank#}2{#/blank#} juice to drink. Whenever {#blank#}3{#/blank#} (go) out on weekends. I always chose fast food. An order of chicken nuggets with a side of fries was what I always wanted.

    Then the food that I loved {#blank#}4{#/blank#} (begin) to give me chest pains, heart burns, and stomachaches. I quickly realized that this couldn't end in anything good. So I decided {#blank#}5{#/blank#} (put) a stop to my unhealthy diet. I cut out fast food from my diet and instead searched for places {#blank#}6{#/blank#} offered me steamed vegetables, fruits, and foods higher in protein like beans which were things that I had been previously lacking in my diet.

    Making a change will never be {#blank#}7{#/blank#}easy task but sometimes it takes a hit of tugging to push us towards {#blank#}8{#/blank#}(we) goal. In my case it took an upset stomach and chest pains to learn that fast food wasn't the best choice for my health, but thanks to this now I feel {#blank#}9{#/blank#}(well) than ever. I am {#blank#}10{#/blank#} (constant) going to the gym, and I'm still eating what I love while supporting ray own body.

Yungang Grottoes (石窟) in Datong, Shanxi Province, are a world cultural heritage (遗产) site with a history that {#blank#}1{#/blank#} (go) back more than 1,500 years. In Yungang's 45 big grottoes and more than 200 small grottoes, roughly 59,000 figures of the Buddha, {#blank#}2{#/blank#} (be) a priceless treasure of human culture.

{#blank#}3{#/blank#}because of the effects of climate change and natural disasters, the grottoes face damage year after year. Thanks to {#blank#}4{#/blank#} (advance) digital technology, researchers are busy "duplicating" (复制) the Yungang Grottoes in an attempt to preserve the precious cultural relics (遗物). Employing 3D laser scanning technology, the researchers{#blank#}5{#/blank#} (digital) record the shapes, colors and other fine details of the grottoes and later reproduce{#blank#}6{#/blank#}by using 3D printing technology.

The new technology could enable more people{#blank#}7{#/blank#} (access) the cultural relics despite the distance. In June, 2020, the Zhejiang University Cultural Relics Research Institute and Yungang Grottoes Research Institute together "copied and pasted" Cave No. 12 of the Yungang Grottoes for an{#blank#}8{#/blank#} (exhibit) in Hangzhou, in which is the world's first 3D-printed 1:1 "copy" of a grotto.

These Yungang{#blank#}9{#/blank#} (researcher) attempt is a good example of technology helping to preserve cultural heritage. It is hoped{#blank#}10{#/blank#}the new digitalized technologies will facilitate the "rebirth" of the cultural relics, and bring them to more places worldwide.