一旦实施了生物控制手段，它的速度就很难控制。
Once a biological control agent is released, it is difficult to control its speed.
毕竟，一旦实施完毕，你必须使用该解决方案。
After all, you have to run the solution once the implementation is done.
但是一些企业担心一旦这个计划开始实施，它们将会遭受亏损。
But some businesses worry that they will lose out if the plan is implemented.
这个建议一旦为专家们所接受，就得以实施了。
Once the suggestion had been accepted by authorities, it was practiced.
一旦新范例得以实施，定能在市场上形成更广泛的影响。
一旦新范例得以实施，定能在市场上形成更广泛的影响。
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