Any of numerous natural and synthetic compounds of usually high molecular weight consisting of up to millions of repeated linked units, each a relatively light and simple molecule.
聚合物许多天然和人工合成的化合物中的任一种, 通常具高分子的重量, 包含最多可达上百万个的彼此重复且相连的单位, 每一个单位都是一个相对较轻和较简单的分子
Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
两个氢原子和一个氧原子结合而成一个水分子。
We can see many molecules flying in the air when a sunbeam penetrated the dark room.
当一束光线穿进暗淡的房间时, 我们可以看到空气中有许多小颗粒在飞舞。
