酒店12点退房是国家法律没有明确规定的行业习惯，也是交易习惯，属于广义上的民事习惯范畴。
Checking-out at 12:00 in hotel is a civil custom which is not definitely regulated by law, and it is also trading custom, and belongs to generalized civil custom.
本文将此法和现有国标和国内行业习惯作对比研究，将对国内刚刚兴起的珠宝评估行业产生指导意义。
This paper has a correlation study between 'SPEED "method and the present national standard, industrial tradition, which will play a direction role in our new jewellery evaluation industry."
可控固定成本的适当金额很难精确地确定，因此预算金额通常是根据惯例，拇指规则(经验法则)，或者行业习惯。
The appropriate amounts of discretionary fixed costs are difficult to determine with precision, so budgeted amounts often are based on traditions, rules of thumb, or industry customs.
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