"The first doses of the vaccine will be available in just a few weeks," 第一批疫苗幾周內就可以到位。"Clinical trials also show that the new vaccine protects with only one dose instead of two," 臨床實驗結果還顯示,新疫苗一針就管用,不用兩針。"The FDA's approval comes as the vaccine is still being tested in children and pregnant women." 與此同時,疫苗注射對兒童和孕婦是否安全目前還在實驗階段。好的,今天我們學習的詞是vaccine...