?? 詞語組成解析
swamp
[swɑmp]
n. 沼澤（地）;濕地;
vt. 淹沒;使沉沒;使陷入困難;忙得不可開交;
vi. 淹沒，沉沒;
birch
[b?:t?]
n. 樺樹，樺木;（鞭打用的）樺條;
vt. （用樺條）抽打，鞭撻;
??? 情景例句
I've got to explain about it.
我得解釋一下此事。
The houses downtown are very expensive.
市區(qū)的房子很貴。
They were expecting their sixth child and were faced with even more pressing economic problems.
第6個孩子即將問世，他們面臨著更為嚴峻的經(jīng)濟問題。