因此现在的试验都是在药物基础上加用新药，新药必须在所有其他药物使用的同时，进一步提高疗效。

So the present comparison is all the drugs plus the new drugs. So the new drug has to show an added benefit on top of all the other drugs.

youdao

因此现在的试验都是在药物基础上加用新药，新药必须在所有其他药物使用的同时，进一步提高疗效。

So the present comparison is all the drugs plus the new drugs. So the new drug has to show an added benefit on top of all the other drugs.

youdao