Unit 2 - 2A

频率

In physics, frequency is measured in hertz, which represents the number of waves passing a point per second.

在物理学中，频率以赫兹为单位测量，表示每秒通过某一点的波的数量。

很少, 不常

She seldom watches television.

她很少看电视。

很少, 极少

She rarely eats sweets, preferring fruit instead.

她很少吃甜食，更喜欢水果。

We like to treat ourselves to dessert once in a while.

They meet for lunch every so often.

More often than not, she arrives early to meetings.

She enjoys a dessert now and then.