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.
应用初始后屈曲理论和尖点突变模型探讨了顶板岩层分岔失稳的机理及其屈曲后的不稳定性,得出了采场老顶初次来压时断裂下沉的计算公式,建立了顶板破断后台阶下沉的判据,给出了台阶下沉量。
Energy consumption in different patterns of ascending and descending the stairs;
不同上下台阶方式的能量消耗分析
He went down the steps with her at his back.
他同身后的她走下台阶。
The old man climbed down the stairs.
那老人费劲地走下台阶。
She has trouble navigating the stair.
她上下台阶有困难。
Then he marched, upright the square, down the steps.
然后他挺起胸来，大踏步走下台阶。
Hold the rail for safety while coming down the steps.
下台阶时,抓住栏杆以保安全。
His heart thumping and his throat dry, he went down the steps.
他的心砰砰直跳，嗓子发干。 他走下台阶。
Analysis of longitudinal deformation profile in city-gate shaped tunnel using top heading and bench excavation method
上下台阶开挖下城门形隧洞纵向变形规律分析
Then the figure moved. Stiffly and slowly, it came down the steps.
这时那人影开始移动了，它僵硬地缓缓走下台阶。
Give them an out.
给他们找个台阶下。
We walked slowly down the steps.
我们慢慢地走下了台阶。
throws his watch, takes three steps,
扔下手表，只下了三级台阶，
She couldn't find him from the top of the steps, and he wasn't on the veranda.
她从台阶上头向下看，找不到他，他也不在阳台上。
He went down the steps and into his cab.
他下了台阶，走进自己的马车。
Hurstwood went down and out.
赫斯渥下了台阶，走了出去。
He was sitting on the bottom step.
他坐在最下面的一级台阶上。
Mind the steps when you go down into the cellar.
你走到地下室去时要当心台阶.
What if you fall down the steps?
你要在台阶上摔下来怎么办？
I fell down the steps and barked my shins.
我从台阶上跌下，伤了我的胫。