Later, he developed the "sugar-coatedpill" vaccine in the early 1960s.
后来，他在20世纪60年代初研制出了“糖丸”疫苗。
2
The pill is coated with sugar.
药片上包了一层糖衣。
3
The making of complaints is obviously an unpleasant business, and if the pill can be sugar-coated, the opportunity must not be missed, as much mercenary as from friendly motives.