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
I see. Is a credit card OK?
我明白了。用信用卡可以吗？
In secondary school, children get more advanced knowledge.
中学的小孩会得到进一步的知识。
'You needn't be so rude about it,' my wife answered as she looked at herself in the mirror.
“你说话没必要这样不客气，”我的妻子边回答边照着镜子。