无法停止计时器(除非停止包含的流本身)，也无法动态地更改时间间隔。

You cannot stop the timer (short of stopping the containing flow itself), nor can you dynamically change the time interval.

youdao

除 EJB 3.0 基于间隔的计时器 API 外，这个领域最重大的改进是对 cron 风格调度的支持。

Most significant in this area is support for cron-style scheduling in addition to the EJB 3.0 interval based timer API.

youdao

在这个示例中，周期基础只是一个计时器，该计时器按照规律的、配置好的间隔到期。

In this example, the periodic basis is just a timer that goes off at a regular, configurable, interval.

youdao