It's more hygienic to use disposable paper tissues.使用一次性餐巾纸更为卫生.Food must be prepared in hygienic conditions.食物必须在卫生的环境中制作。...a white, clinical-looking kitchen that was easy to keep clean and hygienic.易于保持清洁卫生的、像诊所般...
Charcoal prevents browning of tissues and stimulates embryogenesis and rooting.炭可防止组织变棕色并刺激胚胎发生与生根.An antigen that stimulates the production of a particular agglutinin an antibody.任何用来促使凝集原增殖的抗原物质.Amphetamine is a drug t...