Triggering a tiny earthquake is easy (see above about oil production), but triggering an earthquake big enough to matter would be extremely difficult.

引发小地震是很容易的(参见上述有关石油开采的内容)，但是引发大地震是极其困难的。

youdao

The days of easy access to oil are over.

易于获取石油的时代已然结束。

youdao

It was only natural for mankind to exploit the cheapest energy sources first, such as easy-to-extract oil reserves under Saudi Arabia.

很自然，人们会优先开发最便宜的能源，例如沙特阿拉伯易于开采的石油储备。

youdao

And they are easy to repair. The small presses produce good quality oil.

VOA: special.2009.09.29

As for Canada's heralded oil sands region--sure it's a massive resource, but easy oil it ain't.

FORBES: Reserves

Mr. ROUTS: We tend to say to our investors that easy oil is over.

NPR: Would More Biofuel Use Threaten Food Supplies?

Easy oil money probably prevents more widespread development in many OPEC countries.

FORBES: North Korea's Plight Proves the Power of Markets