strain就是力律滤。用力（拉），拉伤，拉紧；压力；旋律；过滤“strain”这个词在英语中用法非常多样呢，它既可以作名词，也可以作动词。名词用法‌张力/拉力‌：比如“The strain within the rocks is suddenly released.”（岩石内部的张力突然释放出来。）‌负担/压力‌：比如“She was tired and under great strain.”（她疲倦且处于巨大的压力之下。）也可以指精神上的压力，像“The vast expansion in secondary education is putting an enormous strain on the system.”（中等教育的大幅扩张正对该系统造成巨大压力。）‌拉伤/扭伤‌：比如肌肉拉伤可以说“muscle strain”。‌血缘/品种‌：在生物学上，“strain”可以用来指菌株，或者动植物的品种，如“Every year new strains of influenza develop.”（每年都有新的流感病毒出现。）‌旋律/曲调‌：在音乐领域，“strain”可以指代旋律或曲调。动词用法‌拉伤/扭伤‌：比如“He strained his back during a practice session.”（他在一次锻炼中扭伤了背部。）‌竭力/使劲‌：比如“I had to strain to hear.”（我不得不使劲去听。）‌拉紧‌：比如“strain the rope”（拉紧绳子）。‌过滤‌：比如“Strain the stock and put it back into the pan.”（滤出原汁，将它放回到平底锅中。）