on the side   (TTS發音)

in addition to a main thing，amount or quantity此外；額外

    His job at the hospital did not pay much，so he found another on the side. 他在醫院工作的報酬不多，所以他另外找了一份兼職。

    Besids fruit，he bought some candies on the side. 除了水果，他還買了些糖。