他匆忙往奶奶家赶。暴风雨太大,树都倒了,但是这并不能阻止他。
D. He hurries back to Grandma's house. The storm is too big. Trees are falling down. But it can't stop him.
研究人员使树蛇从15米高的塔顶端飞行,过程中使用了4个摄影机拍摄蛇滑行的轨迹,以拍摄成三维立体图像。
They launched the snakes from the top of a 15-metre tower and used four video cameras to construct 3-D images of the animals’ trajectories.
在老树周围的虫洞。(D)环绕成树的幼龄树。
Insect holes around an old tree. (d) Young trees surrounding a mature tree.
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