wintertime

冬季、冬天

In the wintertime, the lake freezes over and children skate on it.

冬天湖面會結冰，小孩就在上面溜冰。

冬季的、冬天的僅用於名詞前

Wintertime temperatures here often drop below freezing at night.

這裡冬季的夜間氣溫常常降到零度以下。