1、n.科学家。

2、Scientists are still a long way off finding a cure. 科学家要找到一个治疗方法，还远着呢。

3、Scientists continue to push back the boundaries of human knowledge. 科学家不断扩大人类知识的范围。

4、The scientists are taking water samples from the river. 科学家正从河中采水样。