学个词Learn a Word 第814期 Vaccine

今天我们要学的词是vaccine¹。 Vaccine, 疫苗。"The Food and Drug Administration approved vaccines² designed to protect against the H1N1 flu virus," 美国食品和药物管理局批准了甲型H1N1流感疫苗。

"The first doses of the vaccine will be available in just a few weeks," 第一批疫苗几周内就可以到位。"Clinical trials also show that the new vaccine protects with only one dose instead of two," 临床实验结果还显示，新疫苗一针就管用，不用两针。"The FDA's approval comes as the vaccine is still being tested in children and pregnant women." 与此同时，疫苗注射对儿童和孕妇是否安全目前还在实验阶段。好的，今天我们学习的词是vaccine...

1 vaccine   

n.牛痘苗，疫苗；adj.牛痘的，疫苗的

参考例句：

• The polio vaccine has saved millions of lives.脊髓灰质炎疫苗挽救了数以百万计的生命。
• She takes a vaccine against influenza every fall.她每年秋季接种流感疫苗。

2 vaccines   

疫苗，痘苗( vaccine的名词复数 )

参考例句：

• His team are at the forefront of scientific research into vaccines. 他的小组处于疫苗科研的最前沿。
• The vaccines were kept cool in refrigerators. 疫苗放在冰箱中冷藏。