请帮助翻译 1.直到最近，科学家才发现了......

1.Until recently, scientists have discovered an effective drug in the treatment of cancer

2.Until recently, scientists have not found an effective drug in treating cancer

应该是这样的吧。。。。翻译要注意语法啊，切记不要按汉语翻译啊

Scientists have not discovered an effective drug in the treatment of cancer until recently.

两句的意思是一样的，

not until...直到什么才。。。 谓语动词用非持续性动词。

Only until recently did the scientists find the effective medicines to treat cancer.

Scientists haven't found any effective medicines to cure cancer up to now.