hr.

Appropriate dilutions were made on tryptone-glucose-yeast extract-agar (Difco) and incubated at 37 C for 48 hr before counting.

这一方法并不影响对在对照纸带上未封闭孢子计数。

The role of HR was to devise various schemes and policies so as to channelize the employees' behavior along a desired path.

力源角色就是要设计各种不同方案和政策来引导员工行为，使其能够走上预期道路。

Human Peripheral blood exposed with tritiated water at variousdoses for 54 hr was examined to observe the chromosome and chromatid abe-rrations at metaphases in the first mitosis of lymphocytes.

外周血在不同剂量氚水中培养54小时,观察到淋巴细胞第一次有丝分裂中期染色型及单型畸变。