科学家利用强大的声纳探测系统和水下机器人探索了印度尼西亚北部接近2万1千平方英里，深度从800英尺到2英里不等的海床。
Scientists used powerful sonar mapping system and the robotic vehicle to explore nearly 21, 000 square miles of sea floor off northern Indonesia, at depths ranging from 800 feet to over two miles.
科学家利用强大的声纳探测系统和水下机器人探索了印度尼西亚北部接近2万1千平方英里，深度从800英尺到2英里不等的海床。
Scientists used powerful sonar mapping system and the robotic vehicle to explore nearly 21,000 square miles of sea floor off northern Indonesia, at depths ranging from 800 feet to over two miles.
量具包括千分尺、卡尺、深度尺等。
The measures including micrometer, calipers, depth gauge etc.
深度千分尺用于机械加工中的深度，台阶等尺寸的测量。
The depth micrometers are widely used to measure depth and step in machining...
深度千分尺用于机械加工中的深度，台阶等尺寸的测量。
The depth micrometers are widely used to measure depth and step in machining...
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