"fastens" in Chinese (Simplified)
系上扣上绑紧
Definition
把东西系紧或固定，使其保持在原位，比如系扣子、腰带或带子。
Usage Notes (Chinese (Simplified))
"Fasten" 比 "close" 或 "tie" 更正式。常用于 "fasten your seatbelt"（系好安全带）等表达。通常不用来关闭门，门通常用 "close" 或 "lock"。
Examples
She fastens her seatbelt before driving.
她在开车前**系上**安全带。
He fastens the buttons on his shirt.
他**扣上**衬衫的扣子。
The worker fastens the rope before climbing.
工人攀爬前先**绑紧**绳子。
She always fastens her coat tightly in winter.
她冬天总是把外套**扣紧**。
Before takeoff, the flight attendant fastens the demonstration buckle.
起飞前，乘务员**扣上**示范用的安全带扣。
Tom quickly fastens his backpack before running for the bus.
汤姆在赶公交前迅速**扣上**背包。