The technician must tighten the test tube precisely to prevent leaks.
技术人员必须精准拧紧试管，以防泄漏。
A precise tightening of the vial ensures the sample remains uncontaminated.
精密拧紧药瓶可以保证样本不受污染。
To avoid spillage, the lab assistant needs to seal the vials exactly.
为了防止溢出，实验室助手需要将药瓶精确封口。
The nurse uses special tools to tighten the cap accurately on the medical vial.
护士使用特殊工具精确拧紧药瓶盖。
It is critical to apply just the right amount of torque when tightening the tubes.
拧紧管子时施加适量的扭力至关重要。
Each tube needs to be tightened by hand to guarantee no air gets inside.
每根管子都需要用手拧紧，以确保没有空气进入。
The precision of sealing these vials is paramount for preserving biological samples.
这些药瓶的密封精度对于保存生物样本至关重要。
During the experiment, the tubes were tightened to a consistent torque level.
在实验中，试管被拧紧至一致的扭力水平。
Properly tightening each tube helps ensure the integrity of the experiment.
正确拧紧每根试管有助于确保实验的完整性。
To prevent cross-contamination, each tube must be sealed precisely.
为了防止交叉污染，每根试管都必须被精确封口。
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