刀口

zhè bǎ dāo dāo kǒu fēng lì

这把刀刀口锋利。

This knife has a sharp edge.

tā de yìng hú zi bǎ tì xū dāo de dāo kǒu gěi nòng dùn le

他的硬胡子把剃须刀的刀口给弄钝了。

His stiff beard turns the edge of the razor.

bǎ qián huā zài dāo kǒu shang

把钱花在刀口上。

Use the money where it's needed most.

jìn r yào shǐ zài dāo kǒu shang

劲儿要使在刀口上。

We should bring efforts to bear on the right spot.

bǎ lì liàng yòng zài dāo kǒu shang

把力量用在刀口上

bring one's strength to bear on the crucial point

dāo kǒu réng wèi yù hé

刀口仍未愈合。

The cut has not healed over yet.

dāo kǒu zài tā liǎn shang liú xia le yǒng jiǔ de shāng bā

刀口在她脸上留下了永久的伤疤。

The cut left a permanent scar on her face.

zhè dāo kǒu bù huì liú xia bā hén

这刀口不会留下疤痕。

The cut will not leave any scar.