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。

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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。

youdao

The hotel is just off the main square.

旅馆就在主广场附近。

《牛津词典》

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