n.循环 vi.骑自行车

　　The cycle of seasons is not obvious in Taiwan.

　　四季的循环在台湾并不明显

　　By cycling to and from work every day,I not only save money,but I get a chance to exercise.

　　我每天骑自行车上下班，这样做我不仅省钱,也有机会运动。

　　doubtful

　　a.起疑的；可疑的

　　I was doubtful about the old man's good intentions.

　　这个老头的好意令我起疑。

　　It is doubtful whether Ted will keep his promise.

　　泰德会不会履行承诺令人起疑。

　　doubtless

　　adv.无疑的，必定地

　　Bill has been studying so hard that he will doubtless pass the exam.=Bill has been studying so hard that he will doubtlessly pass the exam.

　　比尔一直是那么用功，所以他必定会通过这次考试。

　　tax

　　n.税金 vt.向……课税

　　Many people think that the import tax on foreign goods is unreasonably high.

　　很多人认为外国货的进口税高到不合理。

　　All the goods should be taxed before they're sold.

　　所有的货品皆须经过打税后才能出售。

　　taxpayer

　　n.纳税人

　　Why waste taxpayers' money on the project？

　　为什么要浪费纳税人的钱在这上面？

　　repair

　　vt. n.修理

　　It took the mechanic almost a week to repair the engine.

　　技师花了将近一星期才修好引擎。

　　The truck is badly in need of repair.

　　这辆卡车极需修理。

　　The car is beyond repair. You should buy a new one.

　　那辆车不能再修了。你应买新车了。

　　The bridge is under repair. Please take a detour.

　　桥正在维修中。请绕道行驶。

　　My car broke down yesterday,so I'm going to have it repaired today.

　　我的车子昨天抛锚了，因此我今天要把它拿去送修。

　　stuff

　　n.东西（不可数） vt.塞满

　　This closet is stuffed with clothes I don't wear anymore.

　　这个衣橱塞满我再也不穿着的衣服。

　　It's stuffy in here because all the windows are closed.

　　这里很闷，因为所有的窗户都是关着的。

　　renew

　　vt.更新

　　The boss decided to renew my contract for another year.

　　老板决定和我再签一年的合约。

　　rebuild

　　vt.重建

　　They rebuilt the bridge soon after the earthquake.

　　地震后他们很快又重新搭起了那座桥。

　　knob

　　n.门把

　　I didn't find the door was locked until I tried to turn the door knob.

　　我试着转动门把时才发现门锁上了。