Perform a growth promotion test as a positive control.

进行一个生长促进试验作为阳性对照。

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Donors who are already ill may have their plasma collected for use as a positive control for laboratory testing.

那些已经生病的捐献者可以收集他们的血浆用作实验室检测的阳性对照。

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Current CNC machines are provided with a positive control limitation protection device, then it is likely to happen malfunction due to its open circuit.

现有数控机床的限位保护装置普遍采用的控制方式是正逻辑控制，这种控制方式可能因线路开路而产生限位失灵现象。

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And that group did much better on the learning task than the control group, because they were put into a positive mood.

第二组,在学习任务上比对照组表现更好，因为他们被置于积极情绪。

哈佛公开课 - 幸福课课程节选

So, when the Senate and the House of Representatives agreed to end the earmarking process a few years ago, it certainly appeared to be a positive step in the direction of gaining a little control over wasteful government spending and a move towards bringing a bit of honestly to the process of government.

FORBES: Why Congress Cannot Operate Without The Bribing Power Of Earmarks

Use it as a positive tool to help you control your money, rather than allowing your money to control you.

BBC: Pile of coins

It's a serious, deep-seated problem that FCC cannot explain why proprietary control over networks is fundamentally a positive thing and the source of genuine "neutrality" (that of "business model neutrality").

FORBES: The 10,000 Commandments