n.疫苗,痘苗( vaccine的名词复数 );
例句:
The vaccines were kept cool in refrigerators.
疫苗放在冰箱中冷藏。
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.
My guess is that the chance that these vaccines will work is zero.
我猜测这些疫苗根本不可能奏效。