English has a large vocabulary with different usages so it's not easy for a Chinese person to speak English as fluently as a native speaker.

英语词汇量很大，用法也很多，所以一个中国人想把英语说的像母语者一样流利并不容易。

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She has not had an easy life.

她不曾有过舒适的生活。

《柯林斯英汉双解大词典》

It has easy appeal for the bully because it does not involve face-to-face contact and it can be done at any time.

VOA: special.2010.04.22

But preparing the captive bred condors to live in the wild again has not been easy.

VOA: special.2009.11.18

Recovery has not been easy despite international donations.

VOA: standard.2010.01.02

Integrating migrants into what, for all Italy's divisions, was previously an ethnically uniform society has not been easy, but it has gone better than expected.

ECONOMIST: The world comes to Italy

But the way has not been easy, and Moto Guzzi has been bought and sold like a mule over the decades, even spending a stretch in government receivership.

WSJ: 2014 Moto Guzzi California 1400 Touring ABS Review: Ponch, Your Ride Is Here | Rumble Seat by Dan Neil

It has not been easy, but at least we are all together, and that is priceless.

FORBES: Connect