这个化学反应需要两摩尔的氢氧化钠。

This chemical reaction requires two ___moles of sodium hydroxide.

草坪上那些小土堆是鼹鼠挖洞的痕迹。

The little mounds in the lawn are signs of ___moles digging underground.

警方发现公司内部潜伏着一个长期收集机密信息的间谍。

The police discovered there was a ___mole in the company gathering confidential information for years.

她的鼻子上有一颗小小的黑痣，看起来很可爱。

She has a tiny ___mole on her nose that looks quite cute.