One thing to note is that, when specifying the externalnumber using the E.164 format, you must encode the leading + as %2B.
需要注意的一点是，在使用 E.164 格式指定外部号码时，必须将前面的 + 编码为 %2B。
2
Compared with the East, however, the West faced a greater number of external threats along more permeable frontiers.
然而，与东方相比，西方在更容易渗透的边界上面临着更多的外部威胁。
3
This single administrator manages any number of activities to any number of external systems, allowing you to easily see and manage your activities from one location.