trouble point的用法和样例：
例句
- Restart packages from the point of failure by using checkpoints.
使用检查点从故障点重新启动包。 - An integral aspect to implementing a highly available messaging system is to ensure that no single point of failure can render a server or network unavailable.
实现高可用性邮件系统的一个整体方面是确保任意单个故障点不能导致服务器或网络不可用。
