Back welding
[化] 封底焊
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
a. 焊的\\n[机] 熔接, 焊接, 锻接
🗣️ 情景例句
But I have a doctor's appointment in the afternoon.
但我后天下午跟医生约好了。
This poetry is realistic.l don't care for it very much.
这首诗是现实主义的.我非常喜欢它。
and the trunk eventually becomes so sore that the elephant curls it up and seldom afterwards uses it for offensive purposes.
象鼻子最后疼得卷了起来，以后它就很少用鼻子去进攻了。