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。
Straining to lift heavy weights can lead to a rise in blood pressure.
用尽全身力气举起重物会导致血压升高。
The doctor said he should not lift heavy weights.
医生说他不能举重物。
By lifting heavy weights, you are sending a signal to your body that you want to preserve your muscle mass, and that you only want to lose fat, not muscle.
通过举起重物，你在向自己的身体发送一个信号：你想保持身体的肌肉，你只是想减掉脂肪而不是减掉肌肉。
What bird lifts heavy weights?
什么鸟可举起重物？
The doctor said he must not lift heavy weights.
医生说他切不可抬重物。
I like lifting heavy weights and feeling strong.
我喜欢举起重物，喜欢强壮的感觉。
He can lift heavy weights because of his strength.
他力气大，可举起重物。
Important advantage is that smaller forces can lift or move heavy weights.
重要优点在于可以较小力量举起或移动较重的重物。
The doctor has ordered me not to lift heavy weights because my heart is weak.
我的心脏弱，医生嘱咐我不要提重的东西。
Jack: in practical mechanics, portable hand-operated device for raising heavy weights through short distances, exerting great pressures, or holding assembled work firmly in position.
千斤顶：在应用力学中，指携带方便、以手操作的装置，可将重物稍微抬高，能施加巨大压力，或将装配好的对象牢固地支撑在原地。
Pictures show the robot walking, lifting heavy weights, using power tools, performing press-ups and even driving with Russian experts hoping it will one day be able to help build a base on the moon.
图片显示，这个机器人能行走、举重、使用电动工具、做俯卧撑，甚至还能开车。俄罗斯专家希望他未来能够帮忙建立月球基地。
Heavy weights and low repetitions are considered best to build muscle.
练肌肉最好是大重量和少重复。
Heavy weights and low repetitions are considered best to build muscle.
练肌肉最好是大重量和少重复。
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