Back-hander
n. 逆打；反手一击；追加的一杯酒；（英）回扣
🧩 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;
n. [机械]支持器；夹头
🗣️ 情景例句
You don't need to do that.
你不用那么做的。
That's very nice of you. I guess I could use some help.
谢谢你的好意。我想我可能要一点帮助。
Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech.
人一旦能用语言同别人交流思想，知识的积累便开始了。