We execute a member function in much the same way as we do any function: To call a function, we follow the function name by the call operator (the "()" operator).
执行成员函数和执行其他函数相似：要调用函数，可将调用操作符（（））放在函数名之后。
But because of the same quality of the product in the market, intense competition, and the low profits, the card faces with gradually recession and the situation of abandonment by the operator.
目前，因为市场产品同质性高、竞争激烈、利润低的原因，面临着逐步衰退，被运营商和消费者抛弃的境况。
By purifying and analyzing at the same time, the operator of the production facility can rely on a steady supply of quality assured carbon dioxide.
通过同时进行纯化和分析，生产设施的操作者可以获得稳定供应且有质量保证的二氧化碳。
By purifying and analyzing at the same time, the operator of the production facility can rely on a steady supply of quality assured carbon dioxide.
通过同时进行纯化和分析，生产设施的操作者可以获得稳定供应且有质量保证的二氧化碳。
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