Then, as he stepped up to thecheckout counter, he saw that his total was $127.00.
然后，他抓紧柜台付帐，他看到了他的总数是127.00美元。
The most important parameter in the single-photon counter is the total sensitivity.
这就是用于检测微弱光的单光子计数器。
The most important parameter in the single-photon counter is the total sensitivity.
这就是用于检测微弱光的单光子计数器。
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