Alloy backing
[医] 合金牙背
🧩 词语组成解析
alloy
['ælɔɪ]
n. 合金;（合金中的）劣等金属;搀杂品;成色;
v. 合铸，熔合（金属）;铸成合金;在…中搀以杂质，使（金属）减低成色;
al(ad-=to)+loy(to bind)→合金；杂质；贬低；损害
backing
[['bækiŋ]]
n. 后退, 衬背, 后援, 支持者\\n[化] 衬垫
🗣️ 情景例句
I've got a million things to do.
我有很多事情要做。
Don't they believe it's necessary?
他们难道不认为它是必要的吗？
Shopping, too, is always a pleasure.
买东西也是一种乐趣。