AngularJs 三目運算符

<div ng-if="scope=='all'" class="outline-border">
    結果：巡檢路線數量： 
    <strong>{{statistics.routesCount?statistics.routesCount:"字符串需使用引號"}}</strong>
    ，覆蓋設備設施總數：
    <strong>{{statistics.routeEqTotal?statistics.routeEqTotal:0}}</strong>
    ，巡檢整體覆蓋率：
    <strong>{{statistics.eqCoverRate?statistics.eqCoverRate:0}}%</strong>
    ，特種設備數量：
    <strong>{{statistics.routeSpecialEqTotal?statistics.routeSpecialEqTotal:0}}</strong>
    ，特種設備巡檢覆蓋率：
    <strong>{{statistics.eqSpecialCoverRate?statistics.eqSpecialCoverRate:0}}%</strong>.
</div>

 <span>{{x.F_BrandName?x.F_BrandName:"無商標"}}--{{x.F_PAbbreviation}}</span>