🧩 词语组成解析
tonic
['tɑnɪk]
n. 滋补品;奎宁水;<音>主音;<语>浊音;
adj. 滋补的;<语>声调的;<医>强直的;<音>主音的;
[医]Amlexanox
🗣️ 情景例句
I went back for it, but the ferry was gone.
等我回去找的时候 船已经开走了。
How can it be so small and heavy?
这样小何以这么重呀？
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。