夜里有时会下雪。
occasionally adv. 偶尔，有时
夜里有时会下雪。
It snows occasionally during the night.
★performance n. 表演，演出
eg. His performance is very good.
★perform
1) v. 表演，行为表现 act, play
eg. They are performing on the stage.
他们正在舞台上表演。
2) v. 做，完成，履行（约定，命令）
perform one's promise 履行诺言
★present意为“目前”、“现在”
The doctor is very busy at present. 医生现在非常忙。
2) adj. 现存的， 现有的
the present problems 现存的问题 当前的政府
3) adj. 在场的，出席的
eg. Who else was present?
当时还有谁在场？
4) n. 礼物 gift 是稍正式的说法
★1.partn. 部分
all parts of the country 全国各地
eg. Which parts of France have you visited?