I once investigated this story and it seems to be wholly untrue.
我曾调查过这个传闻，看来它似乎一点都不真实。
Scientists at the Jet Propulsion Laboratory even once investigated sending a solar sail to rendezvous and ride along with Halley's Comet during its pass in 1986.
喷气推进实验室的科学家们甚至考虑在1986年哈雷彗星经过时发射一个太阳帆与它会合，并沿着它的轨迹飞行。
They have investigated performance practices and have studied and helped to reconstruct archaic instruments once used to play this music.
他们深入表演实践，并设法复制曾在古代演奏这些作品的古老乐器。
The case is being investigated and the 33 Chinese nationals are expected to be deported once they are found.
警方表示找到其他33人后，将会采取强制驱逐出境措施。
We also investigated the mixing process of the two units, and the result showed that they could be well-mixed and loaded successfully for once.
对两释药单元的混合填装工艺进行了研究，结果表明能实现混合均匀并填装胶囊。
We also investigated the mixing process of the two units, and the result showed that they could be well-mixed and loaded successfully for once.
对两释药单元的混合填装工艺进行了研究，结果表明能实现混合均匀并填装胶囊。
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