Using the initial post-buckling theory and the cusp catastrophic model,the bifurcation buckling mechanism and unstability of roof strata were studied to derive the formulae of the main roof breaking convergence during the first weighting,to build the criterion of step convergence after the main roof breaking and to determine the final step convergence value.
應用初始后屈曲理論和尖點突變模型探討了頂板巖層分岔失穩(wěn)的機理及其屈曲后的不穩(wěn)定性,得出了采場老頂初次來壓時斷裂下沉的計算公式,建立了頂板破斷后臺階下沉的判據(jù),給出了臺階下沉量。
Energy consumption in different patterns of ascending and descending the stairs;
不同上下臺階方式的能量消耗分析
He went down the steps with her at his back.
他同身后的她走下臺階。
The old man climbed down the stairs.
那老人費勁地走下臺階。
She has trouble navigating the stair.
她上下臺階有困難。
Then he marched, upright the square, down the steps.
然后他挺起胸來，大踏步走下臺階。
Hold the rail for safety while coming down the steps.
下臺階時,抓住欄桿以保安全。
His heart thumping and his throat dry, he went down the steps.
他的心砰砰直跳，嗓子發(fā)干。 他走下臺階。
Analysis of longitudinal deformation profile in city-gate shaped tunnel using top heading and bench excavation method
上下臺階開挖下城門形隧洞縱向變形規(guī)律分析
Then the figure moved. Stiffly and slowly, it came down the steps.
這時那人影開始移動了，它僵硬地緩緩走下臺階。
Give them an out.
給他們找個臺階下。
We walked slowly down the steps.
我們慢慢地走下了臺階。
throws his watch, takes three steps,
扔下手表，只下了三級臺階，
She couldn't find him from the top of the steps, and he wasn't on the veranda.
她從臺階上頭向下看，找不到他，他也不在陽臺上。
He went down the steps and into his cab.
他下了臺階，走進自己的馬車。
Hurstwood went down and out.
赫斯渥下了臺階，走了出去。
He was sitting on the bottom step.
他坐在最下面的一級臺階上。
Mind the steps when you go down into the cellar.
你走到地下室去時要當心臺階.
What if you fall down the steps?
你要在臺階上摔下來怎么辦？
I fell down the steps and barked my shins.
我從臺階上跌下，傷了我的脛。