Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.

水从叶子内部的细胞涌向外面的细胞，导致叶子迅速地从凸向凹翻转，就像一片柔软的隐形眼镜。

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Then it will grow a leaf and then another leaf.

然后它会长出一片又一片叶子。

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The subject for the evening was "Black Cats and Four Leaf Clovers: Stories about Good and Bad Luck".

VOA: special.2009.03.27

It looks like a leaf. It is nature in its aesthetic form as imitation of itself, life as an imitation of life.

它看起来像一片树叶，它是艺术,化的自然，模仿着它自己，用生命模仿生命。

耶鲁公开课 - 1945年后的美国小说课程节选

He stayed up all night and counted every leaf on the tree and it came very close to what Rituparna said, so he--the next morning-- believed Rituparna.

他彻夜未眠,数了树上的每一片叶子,发现结果和睿都巴若那所言相差无几,所以他在...第二天早晨...,相信了睿都巴若那

耶鲁公开课 - 金融市场课程节选

It differed from related mosses because of its round-tipped leaf tips and flat leaf edges.

BBC: Welsh Bristle-moss

To order a new Presenter and begin using Leaf, visit www.leaf.me.

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