translate 的用法
1.在html页面：文本的翻译
<h1 translate>hello world</h1>
<h1 translate = 'hello world '></h1>
<h1> 'hello world '|translate </h1>2.
placeholder= {{var|translate}}
aria-label={{var|translate}}
tooltip = {{var|translate}}
ng-bind= {{var|translate}}
ng-bind= {{key|translate}}<p translate = 'key'  translate-values= ' { index:' {{var}}'}'
--json
key:".....{{index}}"3.$translate.use();
define(function (require) {return function SavedObjectFactory(es, kbnIndex, Promise, Private, Notifier, safeConfirm, indexPatterns,$translate) {var angular = require('angular');//luochunxiang@eisoo.comvar message ;var lang = $translate.use();if(lang === 'zh-cn'){message = '你确定你想要覆盖 '}else if(lang === 'zh-tw'){message = '你確定你想要覆蓋  '}else{message = 'Are you sure you want to overwrite '}
$
4.$translate.instant（key）var a = $translate.instant("Are you sure you want to delete the selected");
var b = $translate.instant("Are you sure you want to delete the selected");
var aaa = `trgutyr ${a}${currentTab.title}${b}`;
'rtguiyi'
var bbb = aaa;---.jsvar option = {"Seconds": $translate.instant("Seconds ago"),"Minutes":$translate.instant("Minutes ago"),"Hours": $translate.instant("Hours ago"),"Days": $translate.instant("Days ago"),"Weeks": $translate.instant("Weeks ago"),"Months": $translate.instant("Months ago"),"Years": $translate.instant("Years ago")};$scope.relativeOptions = [{text: option.Seconds, value: 's'},{text: option.Hours, value: 'm'},{text: option.Days, value: 'h'},{text: option.Days, value: 'd'},{text: option.Weeks, value: 'w'},{text: option.Months, value: 'M'},{text: option.Years, value: 'y'},];---.html<div class="form-group"><selectng-model="relative.unit"ng-options="opt.value as opt.text for opt in relativeOptions"translate-valuesng-change="formatRelative()"class="form-control col-xs-2"></select></div>

5直接使用window.localStorage.lang;//luochunxiang@eisoo.comvar message ;var lang =  window.localStorage.lang;if(lang === 'en-us'){message = 'MMMM Do YYYY, HH:mm:ss.SSS'}else if(lang === 'zh-tw'){message = 'YYYY年MM月DD日, HH:mm:ss.SSS'}else{message = 'YYYY年MM月DD日, HH:mm:ss.SSS'}6  ng-show = "lang === 'en-us'"<div ng-show = "lang === 'en-us'"><saved-object-findertitle="Saved Searches"type="searches"make-url="step2WithSearchUrl"></saved-object-finder></div><div ng-show = "lang === 'zh-tw'"><saved-object-findertitle="已存搜索"type="searches"make-url="step2WithSearchUrl"></saved-object-finder></div><div ng-show = "lang === 'zh-cn'"><saved-object-findertitle="已存搜索"type="searches"make-url="step2WithSearchUrl"></saved-object-finder></div>7<div ng-if="aggParam.name"><span><label>{{ aggParam.name | translate }}</span> <span translate>Pattern</span></label></div><div ng-if="label"><label>{{ label  | translate }} <span translate>Pattern</span></label></div><!--     <label>{{ aggParam.name | label }} <span translate>Pattern</span></label> -->