Healthy, skin, mucous membranes, and cilia are natural barriers to many viruses.健康的皮肤, 粘膜和纤毛是许多病毒的天然屏障.Seromucous glands contain both mucous and serous cells.浆粘液腺既含有粘液性细胞,又含有浆液性细胞.Latin word originally means a mucous exc...
Listen carefully to the instructions and jot them down.仔细听指示，并记录下来。It doesn't affect my judgement one jot...这丝毫不会影响我的判断。I’ll jot down their address before I forget it.我得赶快把他们的地址写下来，免得忘了。Just jot down the main ideas ...