Make sure you take the car for a proper test drive—you don’t want to buy a pig in a poke, do you?

这车你一定要开一下，可别隔山买牛。

The protein chip kit,ELISA kit and confirmatory methods were used to detect veterinary drug residues(enrofloxacin clenbuterol,streptomycin and sulfadimidine) in pig and chicken tissues.

通过对猪和鸡组织克仑特罗、链霉素等兽药检测,比较了蛋白芯片检测、ELISA检测和确证方法在兽药残留检测应用。

He sharpened the scythes on the grindstone, slaughtered a pig, caught and salted fish, ground barley in a water-driven gristmill and grew and stored potatoes.

他用砂轮磨镰刀，宰猪，抓鱼腌鱼，在水磨坊碾大麦，种土豆收土豆。