keep one's word   (TTS發音)

fulfil one's promise 守約；遵守諾言

    She is a girl who keeps her word. 她是一個守信的女孩。

    You may depend upon what he says，for he is a person who always keeps his word. 你可以相信他的話，因為他是一個遵守諾言的人。

    You must keep your word even if you should lose by it. 即使守信用會吃虧，你也必須遵守信用。

    Bill kept his word and arrived exactly at the time he had promised. 比爾很守諾言，在他所約定的時刻準時到達。