It is extremely important to be very careful when using the exponential window when performing an impact test.
进行锤击试验使用窗函数时，非常小心是极其重要的。
Turntable as a key equipment which is used to simulate and test the semi-objects in the aviation, aerospace and other fields, plays an extremely important role in the aerocraft's development process.
转台作为航空、航天等领域中进行半实物仿真和测试的关键设备，在飞行器的研制过程中起着极其重要的作用。
Therefore, to rule out HIV infection, it is important to re-test three months after the exposure. It is extremely rare for an HIV-infected individual to not develop antibodies by three months.
因此，为了完全排除HIV感染，3个月复检是很重要的，超过3个月还未产生抗体的个案极其极其罕见。
Therefore, to rule out HIV infection, it is important to re-test three months after the exposure. It is extremely rare for an HIV-infected individual to not develop antibodies by three months.
因此，为了完全排除HIV感染，3个月复检是很重要的，超过3个月还未产生抗体的个案极其极其罕见。
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