I need to fasten this belt.

我需要扣紧这条皮带。

We need to fasten these ropes.

我们需要系紧这些绳子。

I use Velcro to fasten my shoes.

我用魔术贴来系鞋子。

Make sure to fasten the gate when you leave.

离开时请确保扣紧大门。

The button on this jacket is hard to fasten.

这件夹克的纽扣很难扣上。

I forgot to fasten the straps of my backpack.

我忘了系上背包的带子。

We had to fasten our seat belts due to turbulence.

由于乱流，我们不得不系好安全带。

The driver reminded the passengers to fasten the seat belt.

司机提醒乘客系好安全带。

Every passenger on the plane needs to fasten their seatbelt.

飞机上的每位旅客都需要系好安全带。

She reminded everyone to fasten their seatbelt before takeoff.

她提醒大家在起飞前系好安全带。