The fact is I've been drinking ever since I was a teenager.事實上， 少年時代起我就開始喝酒

ever since從那時起； 自那時以來

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

自從我催他還錢，他就不露面了。

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

自從她離開他以來，他一直很消沉。

to really pin down the pharmacology of this drug alcohol.希望能切實了解酒精的藥理學(xué)作用

pin down確定； 下結(jié)論

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

很難確切說清她身上有什么東西使他這樣動心。

She's a difficult person to pin down.

她這人行事、說話沒個準(zhǔn)兒。

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

a couple of兩個, 幾個

He patched up a couple of old tires.

他補了幾條舊車胎。

The bowler let go a couple of scorchers.

投球手投出了幾個快球。