点击下方单词,选择对的这个单词
不及物动词
1. to exert much effort or energy
e.g. straining our ears to hear
Synonym: reachstrain
2. attempt by employing effort
e.g. we endeavor to make our customers happy
Synonym: endeavorendeavour
多通过句子记忆单词，而不是单独死记硬背。
