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在为了得到相同的电梯，转子头部得多跑得更快(即较高的每分钟转速)。
In order to get the same lift, the rotor head much run faster (i. e. higher RPM).
youdao
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两个引擎的转速都是每分钟2,500转。
Both engines were running at 2,500 rpm.
《柯林斯英汉双解大词典》
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两个引擎的转速都是每分钟2,500转。
Both engines were running at 2,500 rpm.
《柯林斯英汉双解大词典》