翻译：他花了很长时间才适应外国的生活，同时，他极想收到父母的来信。

他花了很长时间才适应外国的生活，同时，他极想收到父母的来信.

It took him for a long time to get used to the life in a foreign country, and at the same time, he wanted so bad to receive the letters from his parents.

个人建议，仅供参考。

He spent a long time to accustom the life in a foreign country. And at the meantime, he early wanted to receive his parents' letters.