Chase the old lady saw the thief running up the street and chased him on her bicycle.

老妇人看见小偷跑在街上，便骑着自行车去追他。

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Salt Lake City residents should be on the lookout for the thief, who will presumably be riding a very large bicycle very poorly.

盐湖城居民应该注意该小偷，也许他会很费力的骑着这台超大号自行车。

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Johnson was very uncertain as to whether his bicycle was stolen by the thief.

关于他的自行车是否被这个贼偷了，约翰逊不敢肯定。

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An onboard motion sensor can trigger an alert on your smartphone, letting you know that whatever you've tagged is on the move, so that bicycle thief won't get far before you're on the trail.

ENGADGET: BluTracker lets you locate your stuff within 2,500 feet, we go hands-on (video)