扇形穹拱

What he wanted for Sydney was the effect he had noticed when tacking round the promontory at Elsinore, of the castle's piled-up turrets against the piled-up clouds and his own billowing white sails; the liberation he had felt on the great platforms of the Mayan temples in Mexico, of being lifted above the dark jungle into another world of light; the height and presence of Gothic cathedrals, whose ogival shape was to show in the cross-sections of the Sydney roof-shells; and the curved, three-dimensional rib-work of boat-building , as he had watched his own father doing it at Aalborg.

当他在艾尔西诺海岬旁作之字形航行时，天边积云朵朵，海水蓝天融为一色，海风一过，巨大的白帆随之鼓起，城堡上层叠而立的塔楼在一片湛蓝中像条游龙飘忽不定。如此景致早已收藏于心。他所向往的悉尼巨作不正是这幅美景的再现么？当他伫立于墨西哥玛雅寺庙辽阔的平台之上时，那份无拘无束的洒脱正从昏暗的丛林中抽身而出，徐徐升腾，遁入另一个光的世界。这不羁的心不正是他想施予悉尼的么？还有那直插云霄的哥特式大教堂，它们的伟岸和雍容时时撞击着他，剖开未来悉尼歌剧院的扇形穹顶吧，横截面上所展示的不正是带着尖顶拱的外形么？当他在奥尔堡傻傻地看着父亲建造船坞时，那有着优美弧线的三维肋拱结构不也是激活他未来创作的源泉么？

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。