through是一个介词，它表示“通过”或“跨越”的意思。它可以用来描述某物穿过或跨越另一物体的动作，也可以表示动作通过某个时间、地方或者经历了某个阶段。例如：The train went through the tunnel.（火车穿过隧道。） Through can also be used to express a period of time, such as: We lived in London for three years through the 1980s. （我们在伦敦生活了1980年代的三年时间。） Through can also be used to describe something that has been experienced or undergone, such as: She went through a lot of hardships. （她经历了很多困难。）