小测验：选择正确的单词

1. You must regulate a watch that runs slow.
   你必须把走慢的表校准。
2. Pelicans row by on slow, powerful wings.
   鹈鹕划动着有力的翅膀慢慢飞过。
3. The Bus is very slow.
   这辆公共汽车开得非常慢。
4. The tortoise crept along at an agonizingly slow speed.
   乌龟以极其缓慢的速度爬行着。
5. That old airplane was slow in comparison with today's jets.
   和今日之喷射机比较起来那架旧飞机较慢。

　1个名词解释