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飞行高度；[航]实用升限；升高限度
1、ceiling───n.天花板；上限
2、ceiling price───最高限价；最高价
3、curtained ceiling───窗帘式天花板
4、ceiling lights───顶灯（ceilinglight的复数形式）
5、ceiling panels───天花板镶板
6、service───n.服务，服侍；服役；仪式；vt.维修，检修；保养；n.(Service)人名；(英)瑟维斯；adj.服务性的；耐用的；服现役的
7、swaying ceiling───摇摆天花板
8、ceiling rose───天花板灯线盒；[电]挂线盒
9、cathedral ceiling───大教堂天花板
1、Thanks to this new pricing scheme, developers can now use App Engine to deploy larger and more popular applications on the service without hitting the ceiling of Google's free quotas.───现在有了这个新的定价方案，开发者可以通过App Engine部署大型、更受欢迎的程序，而不用担心突破Google免费配额的上限。
2、OK service ceiling or angle of dive might be more relevant, but, if you must compare the weapons, why include the defensive machine guns in a graphical comparison.───确定服务的上限，或潜水的角度来看，可能会较为相关，但是，如果您必须比较性武器，为什么包括防御JiQiang在一个图形的比较。
3、The bomber aircraft and fighter-bomber's service ceiling, most does not surpass 16000 meters.───轰炸机和歼击轰炸机的实用升限，多数不超过16000米。
4、and mechanical service pipes are visible across the ceiling, from which hang industrial-looking pendant lights made by a local fabricator.───通过天花板，可以看到钢梁和机械的给水管。天花板上悬挂了本地制造商生产的非常工业化的吊灯。
1、Most commercial jets have a service ceiling of about 42,000 feet.
2、The bomber aircraft and fighter-bomber's service ceiling, most does not surpass 16000 meters.
3、OK service ceiling or angle of dive might be more relevant, but, if you must compare the weapons, why include the defensive machine guns in a graphical comparison.
4、Fighter plane's service ceiling about 20000 meters, high-altitude surveillance aircraft like US's SR-71, service ceiling approximately 25000 meters.