纸上脚印

Professor worked as everybody's surface to step on several feet on that paper, on the paper in India professor has moistened the full dust and the dirt footprint, then, professor asked this schoolmate to reply that this slip of paper had several destinies.

教授又当着大家的面在那张纸上踩了几脚，纸上印上了教授沾满灰尘和污垢的脚印，然后，教授又请这位同学回答这张纸片有几种命运。

All the secrets lie in the treetop, white papers, dust and footprints.

秘密全部在树梢上，白色的纸，灰尘和脚印。

Vast lawns that extend like sheets of vivid green,with here and there clumps of gigantic trees,heaping up rich piles of foliage:the solemn pomp of groves and woodland glades,with the deer trooping in silent herds across them;the hare,bounding away to covert;or the pheasant,suddenly bursting upon the wing:the brook,taught to wind in natural meanderings or expand into a glassy lake:the sequestered pool,reflecting the quivering trees,with the yellow leaf sleeping on its bosom,and the trout roaming fearlessly about its limpid waters;while some rustice temple or sylvan statue,grown green and dank with age,gives an air of classic sanctity to the seclusion.

大片的草地延展得如同纸上泼洒的生动的绿意，一丛丛的大树遍布周围，树下积聚着大堆的落叶，漫山遍野的丛林及树林间的空地，上面留下了安静的鹿群踩过的脚印；野兔，一跃而过，然后躲藏起来；或者那些野鸡，突然扇开翅膀：小溪，蜿蜒曲折地缓缓流过，或者是延伸汇入到如明镜的湖泊：静僻的湖泊，照映着微微颤动的树木，黄叶卧在塘心，鲑鱼在清澈的河水里无忧无虑地游来游去；而古朴的庙宇，木质的雕像，随着岁月的流逝，而变得潮湿，布满绿苔。给人一种与世隔绝，古典的神圣的氛围。

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。