Merge pull request #720 from AmandaYi/patch-13

Update dnspromises_resolvemx_hostname.md

dns/dnspromises_resolvemx_hostname.md

@@ -4,8 +4,4 @@ added: v10.6.0
 
 * `hostname` {string}
 
-Uses the DNS protocol to resolve mail exchange records (`MX` records) for the
-`hostname`. On success, the `Promise` is resolved with an array of objects
-containing both a `priority` and `exchange` property (e.g.
-`[{priority: 10, exchange: 'mx.example.com'}, ...]`).
-
+使用DNS协议解析`hostname`的邮件交换记录（`MX`记录）。 成功后，`Promise`将通过一系列包含`优先级`和`交换`属性的对象来解决（例如，`[{priority: 10, exchange: 'mx.example.com'}, ...]` ）。