2. 不改变已有字段/接口语义
农历马年的第一缕阳光洒在哈法亚油田，哈法亚公司工程部副经理陈文昱像往常一样，一早来到CPF3采出水处理厂查看运行情况。这一去年刚刚投产的厂区将油田采出水处理能力从过去的5万桶/天提升至20万桶/天，在助力提升原油产能的同时，也为生产污水循环利用提供了技术保障。
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They never did. The flag disappeared eventually, though I received no confirmation.
Most unexpected was Paramount stock’s jump. Wall Street almost always disdains giant acquisitions on the theory that buyers get too excited about big deals and overpay—and indeed, that’s usually what happens. When the deal gets sealed, the buyer’s stock usually drops, but in this case it rose almost 30%. That’s probably because analysts were pleasantly surprised: They had figured Paramount would need to raise its offer from $30 to $32–$34 a share to vanquish Netflix; instead, Paramount offered just $31 and prevailed.
PS Vita TV原本是让玩家在电视上游玩PS Vita的版本，但是并没有获得成功，仅发售两年就停产。