研究人员对这片海域进行了详细调查,以了解海洋生物的分布情况。
Researchers carried out ___surveys of the sea area to study marine life distribution.
学校正在开展一项关于学生饮食习惯的调查。
The school is conducting ___surveys about students' eating habits.
这本杂志包含了对今年科技进步的调查报告。
The magazine includes a ___survey of this year's technological advancements.