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.

人力资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.

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