稀薄化

A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave.

稀薄化介质中密度和压力的下降，例如在空气中，由于声波的穿越而发生

The climate of here is cold and humid and lack of oxygen,everywhere is rugged drumlin、ice cone and permafrost of plateau,the ecological environment is unique and the natural scenery is magnificent.

这里气候寒冷潮湿，空气稀薄，到处是突兀嶙峋的冰丘和变幻莫测的冰锥以及终年不化的高原冻土层，生态环境独特、自然景观壮观。

You will come in May between June, between choice section shorter give birth to half lignification branch in those days, from base the ministry cuts dirty to insert spic, topmost reservation comes 3 pieces 5 flocculus, if branch is too long, yi Ke bite off carries a tip on the head, cuttage medium can use humus soil of orchid mud, high mountain, vermiculite, pearlite or Huang Xin earth to wait, thick about 15 centimeters reach 20 centimeters, the catchment layer that lower berth reachs 8 centimeters 7 centimeters; medium after in season is wet, in will inserting spic to insert matrix, deepness of the be buried that insert spic makes an appointment with the 1/2 that grows for spic, a few cuttage also can choose the family full-dress medium generation makes big flowerpot cuttage seedbed.

你可于5月至6月间，选择节间较短的当年生半木质化枝条，自基部切下作插穗，顶端保留3片至5片小叶，若枝条过长，亦可截去顶梢，扦插介质可用兰花泥。高山腐殖土。蛭石。珍珠岩或黄心土等，厚约15厘米至20厘米，下铺7厘米至8厘米的排水层；把介质喷湿后，将插穗插入基质中，插穗入土深度约为穗长的1/2，家庭少量扦插也可选用大花盆盛装介质代作扦插苗床。插后加盖塑料薄膜保湿，温度控制在25℃至30℃之间，加设荫棚遮挡阳光，或挪放于树荫下，始终保持扦插基质湿润，东鹃约过1个月即可生根，而西鹃则要60天至70天才能生根。9月后可减少遮荫时间，并追施稀薄尿素液一次，浓度约为0.2%，10月下旬即可上盆。

And when the dew evaporated, there on the surface of the desert were fine flakes like hoarfrost on the ground.

露水升化之后，在旷野的地面上，留下稀薄的碎屑，稀薄得好象地上的霜。

Results show that the velocity slips and temperature jumps increase at the solid walls with increasing rarefaction at the same Mach number.

在模拟的结果中显示，相同的Mach number随著气体的稀薄化，速度滑动现象与温度跳动现象会更加明显。

During the vacuolation ofthe meristem cell,the cytoplasm diluted and the numbers of the organellesreduced.

在分生细胞液泡化的过程中，细胞质变稀薄，细胞器减少。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。