Back mutation
回复突变
🧩 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;
🗣️ 情景例句
Between the woods and frozen lake
就在林子和冰湖之间
Those noisy children simply got on my last nerves.
那群孩子吵吵闹闹，简直搅得我心神不宁。
he had included a large number of funny stories in the speech and, of course, it was a great success.
他的祝词里面加进了大量逗人的故事，自然大获成功。