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1·She had on occasion praised him extravagantly.

她有时曾过分地表扬他。《柯林斯英汉双解大词典》

2·He has been known on occasion to lose his temper.

大家都知道他有时会发脾气。《牛津词典》

3·It is, however, necessary on occasion to work outwith these hours.

然而，有时有必要在这些时间之外工作。《柯林斯英汉双解大词典》

4·Some of the players may, on occasion, break the rules and be penalized.

一些选手可能偶尔会犯规并受到处罚。《柯林斯英汉双解大词典》

5·Everyone loses temper on occasion, so don't blame yourself too hard.

每个人都会偶尔控制不住脾气，所以不要过分自责。

6·I kept thinking of how Jerry would on occasion tease George by calling him Biff, a reference to the son of the failed salesman Willy Loman.

我一直在思考为什么杰里有时取笑乔治，称呼他为“比夫”，这是那个失败的推销员威利·洛曼的儿子的名字。

7·On occasion, animals and plants have been preserved after becoming immersed in tar or quicksand, trapped in ice or lava flows, or engulfed by rapid falls of volcanic ash.

有时，动物和植物被浸泡在焦油或流沙中，被困在冰或熔岩流中，或被迅速落下的火山灰吞没后被保存下来。

8·Yes, this does happen on occasion.

是的，这种情况时有发生。

9·I wander in the park on occasion.

我偶尔会去公园逛逛。

10·I call on him on occasion.

我偶尔去拜访他。

偶尔

1·Everyone loses temper on occasion, so don't blame yourself too hard.

每个人都会偶尔控制不住脾气，所以不要过分自责。

2·But on occasion they wondered where the blue Jay had gone and how he was doing and, most of all, if he was still the color blue and what it had all meant.

但是，偶尔他们会想冠蓝鸦飞去了哪里，现在过得怎样，最重要的是，它是否依然是那鲜艳的蓝色，以及曾经发生的一切究竟意味着什么。

3·Of course, given that polar bears are immense carnivores, the notion that they might on occasion attack humans is not exactly shocking.

当然，北极熊是巨大的食肉动物，认为北极熊会偶尔袭击人类的观念也并不使人震惊。

4·I call on him on occasion.

我偶尔去拜访他。

5·On occasion you will almostcertainly want to stop and look around.

偶尔你着实想要停下来，四处看看。

有时

1·He has been known on occasion to lose his temper.

大家都知道他有时会发脾气。《牛津词典》

2·On occasion, animals and plants have been preserved after becoming immersed in tar or quicksand, trapped in ice or lava flows, or engulfed by rapid falls of volcanic ash.

有时，动物和植物被浸泡在焦油或流沙中，被困在冰或熔岩流中，或被迅速落下的火山灰吞没后被保存下来。

3·On occasion, you may see problems with the driver within the virtual machine.

有时，您可能会看到虚拟机中的驱动程序有问题。

4·On occasion we have had development teams make jokes because the leads are never without their tracking spreadsheet in hand, always asking questions and making notes.

有时，我们的开发团队很有趣，因为负责人手头总是不拿跟踪电子表格，总是问这问那，记个不停。

5·On occasion, that can prove a heavy burden indeed.

有时，这的确可能成为非常沉重的负担。

时而

1·At this point, all the above characteristics are present: abrupt tempo and count changes, on occasion extremely fast drumming, morbid lyrics and growling vocal delivery.

在此，以上所有的曲风特征表现为：突变的速度和数的变化、时而出现的极快的鼓点、病态的歌词和吼腔。