点击下方单词,选择对的这个单词
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1. 紧固件;扣件A fastening is something such as a clasp or zip that you use to fasten something and keep it shut.
1. the act of fastening things together
Synonym: attachment
2. restraint that attaches to something or holds something in place
Synonym: fastenerholdfastfixing
多通过句子记忆单词，而不是单独死记硬背。
