lines of the class A drug

《中英對照讀新聞》The Thames : awash with cocaine 泰晤士河中充斥著古柯鹼

◎陳成良

The Thames is awash with cocaine as Londoners snort more than 150,000
lines of the class A drug every day. The figure is 15 times higher
than official Home Office statistics and equates to four out of every
100 people regularly taking cocaine, or up to 250,000 of the capital's
six million residents.

泰晤士河中充斥著古柯鹼，因為倫敦客每天吸食15萬劑?這種A級毒品，較內政部公布的官方統計數字高出15倍，相當於每100人中，有4人慣性吸食古柯鹼，或是首都倫敦600萬人口中，高達25萬人是癮君子。

line
Slang. A small amount of cocaine arranged in a thin, usually tightly rolled strip for sniffing.