而且，当重构视图时，重构两个具有相同大小的数据库的视图所花的时间大约为重构一个数据库的视图所花时间的两倍。
Also, when rebuilding views, the time it takes to rebuild the views for two databases with the same size, is about double the time it takes for one database.
也许是老生常谈：法国人每天花在吃饭上的时间超过两小时，大约是美国人的两倍。
True to the cliche, the French spend more than two hours eating every day — about twice the time Americans devote to swallowing their breakfast, lunch and dinner.
总的来说，在我们的冷启动测试中，我们注意到，使用eXtremeScale时，WebSphereCommerce网站达到稳定状态所需的时间是使用dynacache时所需时间的大约60%—几乎快两倍。
Overall in our cold start tests, we observed that with eXtreme Scale, the WebSphere Commerce site tends to reach steady state in about 60% of the time required for dynacache - almost twice as fast!
据我的粗略测量，在双处理器Linux系统上的Sun 1.3JDK 中进行 ThreadLocal.get()操作，所耗费的时间大约是无争用同步的两倍。
My rough benchmarks running the Sun 1.3 JDK on a two-processor Linux system show that a ThreadLocal.get() operation takes about twice as long as an uncontended synchronization.
尽管分担家务及照顾子女重担的“新派男子”正在兴起，女性花在厨房的时间依然是男性的两倍，而且每周也会在洗衣方面多花大约两小时。
Women still spend twice as much time in the kitchen as men, and around two hours more per week on laundry, despite the rise of the supposed "new man".
而且是劳动密集型的，从种植到收获，水稻所花的时间大约是小麦所需时间的两倍。
It is also highly labour-intensive, requiring about twice the number of hours from planting to harvest as does wheat.
每年美国大约施行17,000千例肾脏移植，6000为活体捐赠，这些肾脏是尸体肾脏存活时间的两倍。
About 17,000 kidney transplants are performed in the United States each year, 6,000 with living donors, whose kidneys tend to survive twice as long as those from cadavers.
为使误差降低到1%，必须等待大约两倍的上升时间。而为了使误差降低到0.1%，则必须等待大约三倍的上升时间(或者接近7倍时间常数的时间)。
To reduce the error to 1%, about two rise times must be allowed, while reducing the error to 0.1% would require roughly three rise times (or nearly seven time constants).
为使误差降低到1%，必须等待大约两倍的上升时间。而为了使误差降低到0.1%，则必须等待大约三倍的上升时间(或者接近7倍时间常数的时间)。
To reduce the error to 1%, about two rise times must be allowed, while reducing the error to 0.1% would require roughly three rise times (or nearly seven time constants).
应用推荐