dangerous rock造句怎么写
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Pointing down to the bottom of the cliff, Mary showed us the dangerous rocks.
Reported here is a typical engineering case history. The high-slope dangerous rock at Dahuangya is treated with unloading by means of coyote blasting.
The developing of dangerous rock is due to release of in-situ stress in rock, aeolation, water erosion and root flerry.
Instead, slam a spacecraft head-on into a dangerous rock to move it in a hurry, then fine-tune it with another spacecraft by using its gravity to pull the rock into a safe path.
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