现在看来成果颇丰:已经成功研制出了两种疫苗，第三种正在研制中；一种治疗天花的试验性药物也正在研制中，但它仍无法治愈天花。

That's now largely been done: There are two vaccines, a third in the works, and there are experimental drugs being developed for treating it, but not curing it.

youdao

现在看来成果颇丰:已经成功研制出了两种疫苗，第三种正在研制中；一种治疗天花的试验性药物也正在研制中，但它仍无法治愈天花。

That's now largely been done: There are two vaccines, a third in the works, and there are experimental drugs being developed for treating it, but not curing it.

youdao