The fact is I've been drinking ever since I was a teenager.事实上， 少年时代起我就开始喝酒

ever since从那时起； 自那时以来

He's been lying low ever since I asked him for the money he owes me.

自从我催他还钱，他就不露面了。

He's been in the doldrums ever since she left him.

自从她离开他以来，他一直很消沉。

to really pin down the pharmacology of this drug alcohol.希望能切实了解酒精的药理学作用

pin down确定； 下结论

It was difficult to pin down exactly what it was in her that pleased him so much.

很难确切说清她身上有什么东西使他这样动心。

She's a difficult person to pin down.

她这人行事、说话没个准儿。

If you have a couple of largeish glasses of wine如果喝下几大杯葡萄酒

a couple of两个, 几个

He patched up a couple of old tires.

他补了几条旧车胎。

The bowler let go a couple of scorchers.

投球手投出了几个快球。