英汉词典

1. (眼神、表情或话语)会意的，心照不宣的
    A sly look, expression, or remark shows that you know something that other people do not know or that was meant to be a secret.

    e.g. His lips were spread in a sly smile...
           他心照不宣地咧嘴一笑。
    e.g. He gave me a sly, meaningful look.
           他心照不宣地看了我一眼，意味深长。