老手

gàn nà yī háng tā shì lǎo shǒu

干那一行他是老手。

He is an old hand at the trade.

kāi chē lǎo shǒu

开车老手

an old hand at driving

tā shì jī jiàn lǎo shǒu

他是击剑老手。

He is an old hand at fencing.

tán pàn lǎo shǒu

谈判老手

veteran negotiator

tā shì duì fu xīn wén jiè de lǎo shǒu

她是对付新闻界的老手。

She's an old hand at dealing with the press.

tā shì wán zhè zhǒng yóu xì de lǎo shǒu

他是玩这种游戏的老手。

He's an old hand at this game.

kē xué jiè lǎo shǒu

科学界老手

someone with experience in the scientific community