The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.

植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。

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Leaves are also one of Mother Nature's most delicate and complex creations.

各种叶子也是自然母亲最精致而复杂创造之一。

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Drake's debut album, Five Leaves Left, was a remarkable work: stuffed with complex, introspective music but leavened with arrangements and production straight off the pop shelf.

德雷克的首张专辑《剩下五根烟》是一张杰作：专辑中充满了复杂内省的音乐，但编曲和制作直接将这张唱片置于流行音乐货架之外。

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Bottom trawling, which involves raking the ocean floor for food on a huge scale, leaves behind wastelands where there had been complex ecosystems.

NEWYORKER: Neptune��s Navy

Mr Ovenden said "Christian guilt complex" was responsible for the addition of fig leaves in artwork from the 17th Century on, to prevent completely naked pictures.

BBC: Graham Ovenden child sex abuse trial: Nakedness 'no shame'