我对这个城市的文化感到生疏。
wǒ duì zhègè chéngshì de wénhuà gǎndào shēngshū 。
I feel unfamiliar with the culture of this city.
他的中文虽然不错，但有些生疏。
tāde zhōngwén suīrán bùcuò ， dàn yǒuxiē shēngshū 。
His Chinese is good, but there are some unfamiliar parts.
我已经很久没有弹钢琴了，技术变得生疏了。
wǒ yǐjīng hěnjiǔ méiyǒu dàn gāngqín le ， jìshù biàndé shēngshū le 。
I haven't played the piano for a long time, my skills have become rusty.