ZDNET's buying adviceThe ToughTested ROC16 is a great power bank that delivers on its promises in terms of capacity and power output. The wireless charging feature is a nice touch, but keep in mind that it's an inefficient way to use power if you're running low. The solar panel is a useful addition -- not because it can fully charge the power bank, but because ToughTested has been realistic about its capabilities.
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为打造适配不同工况的柴油机油，昆仑润滑研发团队从零下40多摄氏度的黑龙江漠河，到零上40多摄氏度的新疆吐鲁番，再到平均海拔4000米以上的青藏高原，收集了数千万公里行车数据，进行了上千次实验。以抗氧化性为例，为大幅延长换油周期，团队历时3年多，将抗氧剂纯度从98%提升至99.5%。而至关重要的分散剂，则评估了30多种化合物，历经1000多次合成试验、80多次台架试验，通过10年攻关终于取得重大突破。