Number + 枚 + 硬币
硬币 (yìngbì) is the Chinese word for "coin," referring to metal currency. It is commonly used with measure words like 枚 when counting individual coins.
我口袋里只剩下几枚硬币了。
wǒ kǒu dài lǐ zhǐ shèng xià jǐ méi yìng bì le.
I only have a few coins left in my pocket.
他喜欢收集各个国家的硬币。
tā xǐ huān shōu jí gè gè guó jiā de yìng bì.
He likes to collect coins from different countries.
你有没有一块钱的硬币?我要买瓶水。
nǐ yǒu méi yǒu yī kuài qián de yìng bì? wǒ yào mǎi píng shuǐ.
Do you have a one-yuan coin? I need to buy a bottle of water.