Adverbs of Low Frequency

从不, 未曾

She never eats meat; she's been vegetarian since birth.

她从不吃肉；她出生以来一直是素食者。

曾经, 任何时候

If ever you need help, just call me.

如果任何时候你需要帮助，就打电话给我。

几乎从不, 很少

She hardly ever misses her morning jog.

她几乎从不错过晨跑。

一次, 仅一次

I only ate sushi once in Japan.

我在日本只吃过一次寿司。

一次, 有一天

She won the lottery one time.

她一次中了彩票。

两次, 在两种情况下

She visited the museum twice.

她参观了博物馆两次。

很少, 极少

She rarely eats sweets, preferring fruit instead.

她很少吃甜食，更喜欢水果。

很少, 不常

She seldom watches television.

她很少看电视。

很少, 不常

She infrequently checks her email on weekends.

她周末很少查看她的电子邮件。

零星地, 不定期地

The old radio broadcasts sporadically, cutting in and out.

旧收音机零星地广播，时断时续。

不常见地, 罕见地

She uncommonly forgets her keys; she's usually very organized.

她很少忘记钥匙；她通常非常有条理。

偶尔, 有时

She visits her grandparents occasionally.

她偶尔去看望她的祖父母。

She enjoys a dessert now and then.

They visit their hometown now and again.

有时, 偶尔

She can be a bit reserved at times.

她有时会有点保守。

偶尔, 有时

The team practices indoors on occasion.

团队偶尔在室内练习。

定期地，偶尔

The professor periodically updates the syllabus, adding new readings when relevant research emerges.

教授定期更新教学大纲，在相关研究出现时添加新的阅读材料。