labeled avidin-biotin method

例句：

1. 1. The label on the package saidit was organic.
   包装上的标签说它是有机的。
2. 2. She labeled the box as agift for her friend.
   她给这个盒子贴上了礼物的标签。
3. 3. Thepolice labeled the suspect asa dangerous criminal.
   警方将嫌疑人标记为一个危险的罪犯。