1) Keep your head down
不要抬头!
3) None of your tricks!
不要摆噱头！
4) Do not lose your head!
不要昏了头！
5) raising point
抬头点
1.
In the experiments of measuring Plank constant by the method of photoelectric effect, the raising point of the volt-ampere character curve of a photoelectric tube to each kind of monocromatic lights can be extracted by 3-ranking step-differential, precisely to 0.
在光电效应法测普朗克常量的实验中，用３阶逐差确定光电管对各种单色光的伏安特性曲线的抬头点，可以精确到０。
6) nose up pitching moment
抬头力矩
1.
The principle of the increase of the nose up pitching moment by opening the drag plate for an airplane has been studied in NH 2 wind tunnel.
在ＮＨ－２风洞中对某机放减速板产生较大抬头力矩的机理进行了研究，通过减速板分离涡场的测量和测力试验表明，抬头力矩主要是由减速板分离涡在平尾处产生较大的诱导下洗角所致，诱导下洗角沿机身轴线向后逐渐减小，减速板前移可以消除抬头力矩。
补充资料：不要
1.表示禁止和劝阻。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条