Arcing back
[电] 回弧
🧩 词语组成解析
[机] 电弧作用
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;
🗣️ 情景例句
I have received the secretarial training for six months.
我曾接受过6个月的秘书训练。
The telephone is ringing.
电话铃响了。
I would make a very poor show of disputing the ownership of a cave with a bear,
要我和一只熊去争洞穴，我会出洋相的；