This type of allergy can very occasionally be fatal.

这类过敏症在极个别情况下有可能是致命的。

《牛津词典》

We only have dinner parties very occasionally these days.

这些日子我们不经常有宴会。

youdao

I didn't eat any meat (except for fish very occasionally) and based my diet on vegetables, rice and many other kinds of plant based foods.

我一点肉都没有吃(除了偶尔吃点鱼肉)，日常饮食以蔬菜、大米和许多其他种类的种植食物为主。

youdao

"And although the rock itself very occasionally contains asbestos, which formerly was mined commercially in California,the fact is, the rock still remains interesting and pretty.

VOA: standard.2010.07.26

I found myself occasionally in disagreement with the direction that President Bush was headed, not very often, and not on any truly fundamental issues.

我偶尔会和布什总统,前进的方向存在分析，但不常有，而且不会,在一些基本问题上存在分歧。

普林斯顿公开课 - 国际座谈会课程节选

Renoir speak occasionally about the poetry of film That's very interesting, but they don't say much.

雷诺偶尔会谈论电影诗歌,这很有趣，但他们说的不多。

麻省理工公开课 - 电影哲学课程节选

There are signposts everywhere to make sure that tourists do not end up as lunch, but very occasionally they do.

ECONOMIST: A survey of Australia

The term describes small natural fireballs which very occasionally follow ordinary lightning, floating across land or through buildings and aircraft.

BBC: Ball lightning baffles scientists

But very occasionally one will bump into a piece of "regular" matter - and that is what they are hoping to detect with DarkSide50.

BBC: Dark Matter: Experiment to shed light on dark particles