1.lustrous adj. 有光泽的；光辉的
The lustrous diamond is incredible expensive.
这个闪亮的钻石是难以置信的贵。
Are the cultured pearls as lustrous as the natural ones?
人工养殖的珍珠和天然的一样具有光泽吗？
2.pedestrians n. 行人（pedestrian的复数）
Work in progress! Walking pedestrians should be cautious.
工程进行中！步行的行人请小心。
As a driver, you must watch out the pedestrians crossing the street.
作为司机，你一定要注意过往的行人。
3.for a little while 不久，一会儿
He doped off for a little while.
他昏昏沉沉地睡了一会儿。
Won't you excuse me for a little while?
请允许我离开一会儿好吗？
4.immaculate adj. 完美的；洁净的；无瑕疵的
This place really is immaculate.
这地方真是完美。
No matter how many guests were present, the great house was always immaculate.
不管有多少客人，房子里总是打扫的干干净净。
5.tumble vt. 使摔倒；使滚翻；弄乱
He tumbled pens, pencils, books, magazines, tapes and cups into a box.
他把钢笔、铅笔、书、杂志、磁带和杯子都扔进了一个盒子里。
The accident tumbled us all out of the truck.
车祸把我们全都从卡车上摔了下来。
6.degradedadj. 退化的；堕落的；被降级的
Degraded ecosystems are not only bad for biodiversity; they are bad for human economies.
况且生态系瓦解不只危害生物多样性，人类经济也同样受害。
7.make up 弥补；组成；化妆；整理
The committee is made up of six women.
委员会由六位妇女组成。
This made up 15%of their total income.
这是他们总收入的百分之十五。
