Boats could carry heavy weights, but canals could not cross hilly terrain; turnpikes could cross the hills, but the roadbeds could not stand up under great weights.
船可以运载重物，但运河不能穿越丘陵地带；高速公路可以翻山越岭，但路基承受不了巨大的重量。
I'll give you one pound an hour, if you will carry a brick under your arm and walk around the square for five hours without stopping.
如果你能在胳膊下夹着一块砖头，在广场上不停地走五个小时，我给你每小时一英镑。
Under this Act, all waterfowl hunters 16 years of age and over must annually purchase and carry a Federal Duck Stamp.
根据这项法案，所有16周岁及以上的水禽狩猎者必须每年购买并持有一枚联邦鸭票。
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