In the first place, most behaviors are governed by more than one gene, and until recently geneticists had no method for identifying the multiple genes involved.
首先,大多数行为是由不止一个基因控制的,而且直到最近遗传学家还没有方法来识别其涉及的多个基因。
Until the advent of EJB technology, there was no way to restrict access to an object or method by a particular user.
直到EJB技术出现后,才能够限制特定用户访问某个对象或方法。
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