adj.偶尔的;临时的;
例句:
He spent five years in Paris, with occasional visits to Italy.
他在巴黎度过了五年,偶尔去意大利看看。
I enjoy the occasional glass of wine.
我喜欢偶尔喝一杯葡萄酒。
This thing isn't occasional.
这件事不是偶然的.