a bad hand at

" The little girl's kungfu isn't bad, but not enough for her to run wild here," said coldly the master, cast a tall old man at his side a sideways glance, and gave a wave of his right hand.

司空玄淡淡的道：“这女娃娃还真的有两下子，可是要到神农帮来撒野，却还不够。”斜目向身旁一个高身材的老者使个眼色，右手一挥。

I am a bad hand at cooking.

我不是煮菜的能手.

He's always afraid of speaking in public. He's a bad hand at speech.

他总是害怕在众人面前讲话, 他不善言辞.

On the other hand, it's possible that people's personalities affect their gene expression-people who go to a lot of fun, germy parties ( or who are really bad at washing their hands) might start to undergo gene-expression changes that strengthen their immune systems.

反过来说，人们的个性也有可能在影响他们的基因表达——经常参加有趣但却在散播细菌的派对的人（或者不会好好洗手的人）或许会在基因表达方面有所变化，而这种变化能强化他们的免疫系统。

Tom isn't a bad hand , now , at explaining Scripture, I'll dare swear.

我敢担保, 汤姆讲解《圣经》还一定讲得不错呢.