🧩 词语组成解析
fall
[fɔl]
v. 落下;跌倒;减少;沦陷;
n. 落下;瀑布;秋天;减少;
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 feel sick as a dog.
我病得很厉害。
Do you have any idea?
你怎么想？
In fact, it would be an assistance to all carnivores though it would be a two-edged weapon when they fought each other.
因此，任何食肉动物有了毒液，都能从中获益。