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1. Cells are the basic units of life, and their cell membranes contain the cell's essential components.
细胞是生命的基本单位,它们的细胞膜包含细胞的基本成分。
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2. The plasma membrane is a thin layer that separates the inside of the cell from the outside environment.
血浆膜是一种薄层,它分隔了细胞的内部与外部环境。
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3. During digestion, enzymes break down food molecules into smaller particles that can be absorbed by the body.
消化过程中,酶将食物分子分解成更小的粒子,这些粒子可以被身体吸收。