🧩 词语组成解析
river
['rivə]
n. 河，江;溪，巨流;
gum
[ɡʌm]
n. 口香糖;树胶;黏胶;牙龈;
vt.& vi. 胶合;涂以树胶;使…有粘性;
🗣️ 情景例句
I have worked hard at my major subject.
我对主修课特别用功。
Doesn't matter what you say.
说了也没用。
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因为那时英国人害怕入侵，隧道早已建成了。