The baffling Drake equation reads: N = R* x Fp x Ne x Fi x Fc x L, and helped pioneering scientist Professor Drake to predict that there could be 10, 000 civilisations in our galaxy.
这一令人费解的“德雷克等式”为N = R* x Fp x Ne x Fi x Fc x L，先驱科学家德雷克教授曾利用该公式作出预测：银河系中可能存在1万种文明。
Antitheticly, the NW striking faults are smaller and commonly wrench faults to cut the NE striking faults (ma X y, 1989).
北西向断裂规模较小，一般为一些横截北东向断裂的扭性断裂(马杏垣，1989)。
X ray lasers that a Ne plasma is pumped by the intense Na radiation is simulated. By mixing a large amount of hydrogen with Ne, electron temperature is very low and laser gain is increased obviously.
数值研究短脉冲强钠X光泵浦氖激光介质的X光激光，通过在氖中加氢的办法降低了电子温度，有效地提高了激光增益。
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