难得的

Deep autumn of setting sun, that low hill that go to many year agos of timespace pullouts, I am in setting sun the 静静 lookings at the remaining 辉, soon the small grass that wither away at nearby float shake, do not know is that tree ascends the leaf that drop down, from my in front float, I want to stretch hand to hold tight it, I want that again see it float the zero body the 姿, wanting to use my heart 暖 it the lifetime, but I have no, I did not stretch hand, selfish I let it is from I nearby float walk, a remaining for leaving I first individual being fond of 茫 lookinging at setting sun reflects shine on the earth, breeze not tight not slowly blow, the distant place spread the mineral area the broadcast in of song, break continuously and continuously come right away my ear the beside," probably tomorrow the sun the west descends the tired bird have returned, you will already step on old hour of the way home, life rare look for again mutually the companion that know, life finally difficult give up the very blue white cloud a remaining for" I in such deep autumn, setting sun in deep autumn I remembering this a few lyricses, autumnal winds bringing doing not calculate wonderful singing, however taking foliar feeling in autumn, setting sun reflect shine on my face, however the 勾 has the much more several remembering fondly.

深秋的夕阳，把时空拉回到多年前的那个山岗，我在夕阳里静静的看着余辉，快要枯萎的小草在身边飘摇，不知道是那棵树上掉下来的叶子，从我面前飘过，我想伸手去抓住它，我想再一次看看它飘零的身姿，想用我的心暖它一辈子，可是我没有，我没有伸手，自私的我让它从我身边飘走了，只留下我一个人迷茫的看着夕阳的余辉映照着大地，风不紧不慢地吹着，远处传来了矿区广播里的歌曲，断断续续的就来到我的耳旁，&或许明日太阳西下倦鸟已归时，你将已经踏上旧时的归途，人生难得再寻觅相知的伴侣，生命终究难舍蓝蓝的白云天&我在这样的深秋，在深秋的夕阳里我记住了这几句歌词，秋风带来不算美妙的歌声，却带走了秋叶的情，夕阳的余辉映照着我的脸，却勾起了几多的思念。

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。