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的计数。

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

源的角色就是要设计各种不同的方案和政策来引导员工的行为，使其能够走上预期的道路。

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.

将体外周血在不同剂量的氚水中培养54小时,观察到淋巴细胞第一次有丝分裂中期的染色体型及单体型畸变。