When preparing a module a special care should be taken to explicitly define a public API. It doesn’t mean you have to use the “interface” keyword. It’s enough to ensure that the developers who might be interested in using your module, know which elements are to be used and which are not (i.e. what is an input and what’s an expected output).
Pull-through transforms
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三是成本控制和运营效率。原材料价格上涨的压力已经摆上台面，而终端竞争又不允许轻易涨价，谁能在这个局面中守住毛利率，谁就在下半年有更多腾挪空间。
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