It is advisable to check the instrument by frequent calibration.最好通过经常的校准来检查仪器.These data can be plotted to form a calibration curve.这些数据可以绘制成一校准曲线.The instrument is very delicate for general calibration purposes.这种仪器作为一...
下学期咱们会研究二战时期。Next term we'll be looking at the Second World War period.这学期我要认真学英语了.I'm going to get down to studying English this term.每个学生一学期可能要修四五门课程.A student will probably attend four or five courses during...