random n.隨機(jī) a.隨機(jī)的
seldom adv.很少；不常
serfdom n. 農(nóng)奴的身分; 農(nóng)奴制度
thralldom n. 奴隸的身分,束縛
wisdom n.(古人的)名言，格言
例句：
Where people were concerned, his threshold of boredom was low.
涉及人的事情，他便極易感到厭煩。
We played cards to relieve the boredom of the long wait.
長時(shí)間等待實(shí)在無聊，我們就打撲克來解悶兒。
One cannot choose freedom for oneself without choosing it for others.
人不能光為了自己的自由而不顧別人的自由。
Basic human rights, including freedom of speech, are now guaranteed.
現(xiàn)在，包括言論自由在內(nèi)的基本人權(quán)已有了保障。