The pre-pressure water shock tube dynamic calibration method is put forward.
提出了预压水激波管动态校准方法。
Pre - pressure need further study because it involves many factors.
预压力与很多因素有关，需作进一步探讨。
Pre-hypertension and high blood pressure can increase the risk of a heart attack.
高血压前期和高血压都会增加心脏病发作的风险。
Pre-hypertension and high blood pressure can increase the risk of a heart attack.
高血压前期和高血压都会增加心脏病发作的风险。
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