这些高频率与离心机的转速相对应；美国对能够以600赫兹以上频率运行的频率转换器驱动的出口进行了严格管控。
These high frequencies correspond to the rotation speeds of centrifuges; America tightly controls the export of frequency converter drives able to operate at frequencies above 600 Hz.
尽管他的确没有权利那样做，但奥巴马先生还是下决心“通知”：BP必须拿出足够的资金放进一个它无力管控的第三方代管账户那里以满足所有的赔偿索求。
Mr Obama decided to "inform" BP that it must put adequate funds to meet all compensation claims into an escrow account beyond its control, although he has no authority to do so.
以中国为例，随着通胀水平达到两年多以来的高点，中国最近采取了消费品价格管控措施。
With inflation at its highest level for more than two years, China, for instance, has recently resorted to controls on consumer items.
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