往往是的英文：
tend

参考例句：

preconditions are often needed
先决条件往往是必要的。

Haphazard answers are usually wrong.
随便的回答往往是不对的。

But the Rightists' criticisms are usually malicious, because they are antagonistic.
右派的批评往往是恶意的，他们怀着敌对情绪。

Practical experience is often very important.
实践经验往往是很重要的。

To worry is often to energize needlessly.
忧虑往往是浪费精力。

It is sometimes impossible to keep clear of errors.
误差往往是不可避免的。

The mother is often the pivot of family life.
母亲往往是家庭生活的中心人物。

Appearances are often deceptive,ie Things are not always what they seem to be.
外表往往是靠不住的.

Our insignificance is often the cause of our safety
微不足道往往是安全之本。

To worry is often to energize needlessly
忧虑往往是浪费精力。

tend是什么意思：
v. 趋向；倾向；照料，照顾；注意，留心

He tends to talk large.
他喜欢讲大话。

The interests of seniors tend to be . . . varied
老年人的兴趣倾向于…多彩的。

This phrase tends to become obsolete.
这个短语已渐渐成为废词。

We tend to think in absolutes.
我们思考问题倾向于绝对化。

They also tend to be active in their communities.
他们在他们的住区里也往往是活跃分子。