wài kē / yī shēng / ná qǐ / jiě pōu dāo / àn zhào / biāo jì / xiǎo xīn / de / qiē kāi / le / zǔ zhī

外科医生拿起解剖刀，按照标记小心地切开了组织。

The surgeon picked up a scalpel and carefully cut through the tissue along the marked line.