以下为句子列表：
英文: Internal fertilization is an adaptation to life in a terrestrial environment.
中文: 体内受精是对陆地生活环境的一种适应。
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英文: Internal fertilization takes place in the seed plants and some clubmosses and ferns, often by means of a pollen tube.
中文: 种子植物、某些石松和蕨类植物依赖于花粉管完成体内受精。
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