Infectivity
n. 傳染性, 易傳染\\n[醫] 傳染性, 傳染力
??? 情景例句
Maybe I can help. Tell me what it is, Susan.
也許我能幫忙。說給我聽聽 ，Susan。
Never swap (or swop) horses while crossing the stream.
騎渡中流莫換馬。（指危難時不宜做大變動）
I go to bed at about 10:00.
我大概十點上床睡覺。