羽状浅裂的

Leaves reduced upwards. Inflorescence branching, umbels compound, terminal on stem and branches; bracts entire, 2–3-lobed to pinnate or absent; rays 5–20, those of primary terminal umbel stout, spreading-ascending or diffuse; bracteoles similar to bracts or absent; umbellules 10–30-flowered.

叶向上变小花序分枝，复伞状花序，在茎和分枝上顶生；苞片全缘，2-3浅裂到羽状的或无；伞辐5-20，那些初级顶生伞形花序坚固的，平展上升的或铺散的；小苞片类似苞片或无；小伞形花序10-30开花。

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。