Definition: to close or fix something together, or to become closed or fixed together Level: B1
飞行期间请系好您的安全带。
Please ___fasten your seat belt during the flight.
这件夹克用拉链固定。
This jacket ___fastens with a zipper.
骑自行车前，您应始终牢牢固定好头盔。
You should always ___fasten your helmet securely before riding a bike.
