All the time you are in doubt about the cause of your illness, you are fighting against an invisible enemy.

一直以来你都在怀疑自己的病因，你是在和一个无形的敌人斗争。

《柯林斯英汉双解大词典》

Some of it may be the changes your body's going through: All those hormones you hear so much about can cause mood swings and confused emotions.

这可能是你身体经受的一些改变造成的：你听过的很多激素都会导致情绪变化或者困惑的情感。

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Or perhaps your spouse has no intention of retiring, which can cause tension if you assumed you'd spend all your time together.

或者，可能你的配偶还没有任何退休的打算，这时，如果你希望与对方共度时光的话，可能会造成关系紧张。

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So thank you, all of you, for what you are contributing to this important cause.

WHITEHOUSE: Strengthening America��s Historically Black Colleges and Universities | The White House

When you lend your voice to the cause of creating jobs and opening opportunity for all communities, I hear you.

WHITEHOUSE: National Hispanic Prayer Breakfast

If you're one of the lucky folks who live in or around the yellow area pictured on the map (it's a map of the upper 48 United States), grab the closest gadget with GPS, your EV-DO-sportin' laptop, and the keys to your pickup, 'cause money is literally falling out of the sky all around you 24-hours-a-day.

ENGADGET: Cash-in on your geocaching skillz