重点讲解:
1. speed up 加快(…的)速度;
This system helps speed up access times.
这个系统有助于加快存取时间 。
2. at least (数量)至少,不少于;
The cheese is left to age for at least a year.
这种奶酪至少要搁一年才成熟 。
3. less than (用在数字或数量前)少于,低于,比…少;
Motorways actually cover less than 0.1 percent of the countryside.
高速公路的实际覆盖面积还不到农村地区的0.1% 。
n. 冰河,冰川