诸如NIST-F1的仪器运用的原子信号是频率为数十亿赫兹的微波，新式时钟包括奥茨的都是运用频率快上百万倍的光。
While devices like the NIST-F1 use atomic signals of microwave frequency with billions of cycles per second, newer clocks, including Oates’, rely on light waves beating a million times faster.
美元节俭汽车团体公司已经接受赫兹公司最近关于产业链的大约1.56十亿美元的投标。
Dollar Thrifty Automotive Group Inc. has accepted Hertz's latest bid of about $1.56 billion for the chain.
美元节俭汽车团体公司已经接受赫兹公司最近关于产业链的大约1.56十亿美元的投标。
Dollar Thrifty Automotive Group Inc. has accepted Hertz's latest bid of about $1.56 billion for the chain.
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