中國網(wǎng)站品牌欄目（頻道）
Panting and sweating, two men on a tandem bicycle finally made it to the top of a steep hill.
"That was a tough climb," said the front rider.
"Sure was," replied the second. "And if I hadn't kept the brake on, we would have slid down backward."
注：tandem bicycle：雙人自行車
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