重点讲解:
1. at least (数量)至少,不少于;
例句:He has been there at least twice.
他至少去过那儿两次。
2. to no avail 毫无用处;没效果;
例句:His efforts were to no avail.
他徒劳无功。
3. for the first time 首次;第一次;
例句:Ten years ago, I went to the tropics for the first time.
十年前我第一次到热带去。
4. according to 据…所说;按…所载;
例句:According to the old legend, Romulus was the founder of Rome.
按照古老的传说,罗穆卢斯是古罗马的建国者。