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[电] 反向电流
🧩 词语组成解析
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[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
Stretch up...and we're going to go left first ...
伸展……先向左……
Would Dr.Block be able to see me at 9:30 tomorrow?
明天9点半布洛克医生能给我看病吗？
Then he remembered his comrade downstairs.
然后他想起楼下的同志。