emerge: to appear, or to become recognized.
1.和“appear”一样，是个常见不及物动词。
2.“emerge”前的主语经常是“问题”“挑战”。
老问题一直都存在，新问题也开始暴露出来。
翻译：The old question always exists,and the new one also begin to emerge.
参考翻译：Old problems remain, and new problems are beginning to emerge.
场景：We were having lunch together as my friend emerged .
