"It puts too much stress on the already sore tendon," he says, adding that you should use caution and avoid overstretching, in particular on stair stretches.

“这会对本已酸痛的跟腱造成更大的应力负担，”他说，同时补充道，应注意避免过度拉伸练习，尤其是不要做面向阶梯的拉伸练习。

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If you're walking on a treadmill or using a stair-climbing machine, try reading so you lose track of the minutes while you're burning calories.

如果你在跑步机上跑或使用踩步机，试着看书，你会忘记时间又能燃烧脂肪。

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When singers singing and dancing on the stage, they will be small as an ant if viewed from the far back or up-stair seats. Even with binoculars, you can't see the expression of the singer.

歌星在台上蹦蹦跳跳唱唱，老高老远看上去，比只蚂蚁大不了多少，表情再丰富，用高倍望远镜也看不清。

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