faut

It is not comme il faut for a gentleman to be constantly asking for money.
对一位绅士来说，经常向别人要钱是不合适的。
By this method, the TFDES has been constructed for diagnosising the faut of three axis turntables, and the effect is well.
以此方法构建的TFDES目前已应用于高精密三轴转台的故障诊断中，效果良好。