Tetanus toxin can also be found in the serum using a bioassay.

定法可在血清中发现破伤风毒素。

And then we used these substances to create bioassays that enabled us to discover the first substances that stopped cancer blood vessels and to help stop cancer.

然后我们用这些质来创建检，我们能够发现第一种阻止肿瘤血管的质，进而帮助阻止肿瘤长。

But, throughout the 20th century, other methods were explored: the AZ Pregnancy Reaction Test popped up in 1928 and was the first of several " bioassays" or animal-based tests.

但是，20纪，人们都在探索其他的方法：AZ妊娠反应试出现于1928年，是多种“鉴定”或基于动进行的试中的第一种。