The transformation rule is simple: output a single lang field whenever the language context changes.

转换规则非常简单：当语言上下文发生改变时输出一个lang字段。

youdao

In the spring of 1999, when Lang was sixteen, he went to New York and in a single afternoon auditioned for the Cleveland Orchestra, at Carnegie Hall, and for a manager of the Chicago Symphony.

NEWYORKER: The Olympian

There is no single model to follow when you are hired from the outside as CEO but the playbook that Laura Lang is writing at Time, Inc. is pretty good one to follow.

FORBES: Move up http://i.forbesimg.com t Move down

Consumers are beginning to believe the high prices are a result of structural changes in the global economy, not the result of a single event like Hurricane Katrina, which produced a period of high fuel prices earlier this decade, Lang said.

CNN: U.S. cities scrambling to meet rising mass transit demands