什么是 fasten?To attach firmly to something else, as by pinning or nailing.To make fast or secure.To close, as by fixing firmly in place.To fix or direct steadily: fastened her gaze on the stranger. To place; attribute: fastened the blame on the weather. To impose (oneself) without welcome.To become attached, fixed, or joined.To take firm hold; cling fast: fasten on a notion. To focus steadily; concentrate: All eyes fastened on the speaker.