學(xué)個詞 Learn A Word:814 vaccine

今天我們要學(xué)的詞是vaccine。 Vaccine, 疫苗。"The Food and Drug Administration approved vaccines designed to protect against the H1N1 flu virus," 美國食品和藥物管理局批準(zhǔn)了甲型H1N1流感疫苗。
"The first doses of the vaccine will be available in just a few weeks," 第一批疫苗幾周內(nèi)就可以到位。"Clinical trials also show that the new vaccine protects with only one dose instead of two," 臨床實(shí)驗(yàn)結(jié)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(shí)驗(yàn)階段。好的，今天我們學(xué)習(xí)的詞是vaccine...