Pertussis vaccine
[醫] 百日咳菌苗
?? 詞語組成解析
pertussis
[p?'t?sis]
n. 百日咳;
vaccine
['v?ksi:n]
n. 疫苗，痘苗;
adj. 痘苗的，疫苗的;
??? 情景例句
Notices are displayed on the bus asking people not to smoke.
公共汽車上張貼著請勿吸煙的公告。
That is a very agreeable idea.
那是很棒的創意。
Then knowledge began to be accumulated according to a systematic plan.
于是，知識便開始有系統有計劃地積累起來。