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(yīng)用初始后屈曲理論和尖點(diǎn)突變模型探討了頂板巖層分岔失穩(wěn)的機(jī)理及其屈曲后的不穩(wěn)定性,得出了采場(chǎng)老頂初次來(lái)壓時(shí)斷裂下沉的計(jì)算公式,建立了頂板破斷后臺(tái)階下沉的判據(jù),給出了臺(tái)階下沉量。
Energy consumption in different patterns of ascending and descending the stairs;
不同上下臺(tái)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(tái)階。
The old man climbed down the stairs.
那老人費(fèi)勁地走下臺(tái)階。
She has trouble navigating the stair.
她上下臺(tái)階有困難。
Then he marched, upright the square, down the steps.
然后他挺起胸來(lái)，大踏步走下臺(tái)階。
Hold the rail for safety while coming down the steps.
下臺(tái)階時(shí),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(tái)階。
Analysis of longitudinal deformation profile in city-gate shaped tunnel using top heading and bench excavation method
上下臺(tái)階開(kāi)挖下城門(mén)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(shí)那人影開(kāi)始移動(dòng)了，它僵硬地緩緩走下臺(tái)階。
Give them an out.
給他們找個(gè)臺(tái)階下。
We walked slowly down the steps.
我們慢慢地走下了臺(tái)階。
throws his watch, takes three steps,
扔下手表，只下了三級(jí)臺(tái)階，
She couldn't find him from the top of the steps, and he wasn't on the veranda.
她從臺(tái)階上頭向下看，找不到他，他也不在陽(yáng)臺(tái)上。
He went down the steps and into his cab.
他下了臺(tái)階，走進(jìn)自己的馬車(chē)。
Hurstwood went down and out.
赫斯渥下了臺(tái)階，走了出去。
He was sitting on the bottom step.
他坐在最下面的一級(jí)臺(tái)階上。
Mind the steps when you go down into the cellar.
你走到地下室去時(shí)要當(dāng)心臺(tái)階.
What if you fall down the steps?
你要在臺(tái)階上摔下來(lái)怎么辦？
I fell down the steps and barked my shins.
我從臺(tái)階上跌下，傷了我的脛。