1
strain to do sth
表示费力做某事，常用于进行时。
She is straining to lift the heavy box.
她正使劲抬起那个重箱子。
剧烈或强烈的用力
strainings — plural of straining
先理解核心含义，再看它在真实句子里的用法。
剧烈或强烈的用力
an intense or violent exertion
She is straining to lift the heavy box.
她正使劲抬起那个重箱子。
指用力过度的情况
用力(如肌肉)的行为；紧张。
The act by which one strains. (muscles, etc)
过滤；用滤器过滤的过程。
filtering, the process of passing something through a strainer.
He was straining to lift the heavy box.
他正使劲搬起沉重的箱子。
She is straining the pasta to remove the water.
她正在过滤意大利面以去除水分。
The teacher is straining the students' patience with the difficult exam.
老师用难的考试考验学生的耐心。
表示费力做某事，常用于进行时。
She is straining to lift the heavy box.
她正使劲抬起那个重箱子。
表示通过筛子等过滤，宾语是被过滤物。
Straining the pasta removes excess water.
过滤意大利面可以去除多余的水分。
Not this
He felt a straining in his muscles after the workout.
Use this
He felt straining in his muscles after the workout.
名词 'straining' 是不可数名词，不能与不定冠词 'a' 连用。应去掉 'a'，或改用可数名词 'strain'（如 'a strain'）。
Not this
She is straining on the rope to pull it tight.
Use this
She is straining at the rope to pull it tight.
动词 'strain' 表示用力拉时，固定搭配介词为 'at'，而不是 'on'。'strain at' 意为用力拉某物，而 'strain on' 不地道。
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use strainings naturally, then get feedback on meaning, tone, grammar, and phrasing.
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动词时常用作及物或不及物；名词不可数，常指费力或过滤
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.