wǒ / de / bāo / lǐ / zǒng / shì / fàng / yī / bǎ / luó / dāo / fāng / biàn / nǐng / luó / sī

我的包里总是放一把螺刀，方便拧螺丝。

I always keep a screwdriver in my bag for tightening screws.