v.呼吸试验
The policeman asked me to blow into a plastic bag, ie in order to breathalyse me.
警察要我吹一下塑料袋(以测定我呼吸中的酒精含量).
If police breathalyse me and find I am over the limit I face a long ban.
如果警察对我作呼气测醉试验,发现我饮酒过量,我将会被禁驾很长时间。