The rules state that samples must be enclosed in two watertight containers.规则要求样本必须装在两个水密容器中。The flask is completely watertight, even when laid on its side.即使平放，这个真空水杯也是滴水不漏。The case has to be made watertight.案由必须做到无懈可击。...
Objective To observe susceptibility of Streptococcus mutans biofilms to erythromycin.目的观察变形链球菌生物膜对红霉素敏感性.Recent studies suggested that erythromycin may be effective in prophylaxis against pertussis in exposed, susceptibl...
They also play an important role in immune reactions.它们在免疫反应中也起着重要的作用.Nonbiological degradation processes play an important role in the dissipation of many pesticides in soil.非生物降解过程在消除土壤中的许多农药方面起着重要的作用.Variational princ...
他必须在顶上多加些沙土作为防御物.He must pile more sand on top as a shield.他们在州的南部铸造堡垒和其他防御物.They built forts and other defensive positions across the southern parts part of the state.肯恩视力, 然后点火, 取出后面的正确轮胎和秃鹰机器的防御物.Ken sights, then fire...