Opium is classed under the head of narcotic.

鸦是归入麻醉剂一类东西。

To calm his mind he began to take laudanum.

为了镇定己神经，他开始服鸦酊。

That man gave her a dose of opium.

那男人给了她一剂鸦。

I was splicing together a video from the footage on opium-growing.

我正在连接摄鸦生过程胶一段录像。

After the Opium War of 1840,China was gradually reduced to a semicolonial and semi-feudal society.

1840年鸦战争后,中国逐渐沦为一个半殖民地半封建社会。

Opium is addictive.

鸦会让人瘾。