h. s.

英

美

[医] 临睡时

H. S. had more injurious effect on saltbush than cotton, which cause the increase of K~ (+), Na~ (+) content in leaves and xylem sap.
但是CHS对滨藜的质膜透性影响较大，从而引起木质部汁液和叶组织中K~+、Na~+的增多。
The contributions by H. S. Tsien to modern mechanics and engineering sciences, especially his work on a series of key problems in aerodynamics, solid mechanics and jet propulsion, are introduced.
介绍了钱学森先生在近代力学和技术科学发展中的贡献，特别是介绍了他为实现超声速飞行和火箭技术在一系列关键问题上所做的贡献。
Process of pre-heating before forging and heating characteristics for H. S. S. ingot are discussed, the effects of heat preservation in high temperature on improving ingot plasticity, raising rate of finished products and productivity rate are stated.
讨论了高速钢钢锭的锻前加热工艺及其加热特性，阐述了高温保温对提高高速钢锭塑性、成材率以及生产效率的作用。
A new method for directly displaying h. f. s. of atoms by laser-induced fluorescence
利用激光感生荧光直接显示原子能级超精细结构的新方法