这些飞行侦察是十分重要的。

These reconnaissance flights are important "."

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但在最近一次在巴西帕拉州雨林边界上空的侦察飞行中，空气中竟然连片缕烟丝都没有。

But on a recent surveillance flight over the forest frontier in Brazil's state of para, there was hardly a wisp of smoke in the sky.

youdao

美方飞机在中国近海所从事的并不是一般的飞行，而是收集中国情报的侦察活动。

The U.S. planes are not conducting ordinary flights in the airspace over the waters off China's coast, but are carrying out reconnaissance activities to collect intelligence about the Chinese side.

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