将不可修改对象放置在范围容器避免了许多原子性和可见性故障；将有效不可修改性对象放置在范围容器中也是安全的。
Placing immutable objects in a scoped container avoids most atomicity and visibility failures; it is also safe to place effectively immutable objects in a scoped container.
这种新型相机利用红外线，3到6英尺(1到2米)的范围内对人眼不可见，从而避免多种物质带来的错误反馈。
The new camera, which USES infrared light that is invisible to the human eye at a distance of three to six feet, is intended to avoid many of these complications and false positives.
在全球定位系统信号不可见的情况下，可使用伪卫星系统扩展其使用范围，全球定位系统信号发生器是其中的关键组成设备。
GPS pseudolites systems were employed to extend the availability of GPS when satellites signals were not seen. GPS signal generators were the core part of pseudolites system.
在全球定位系统信号不可见的情况下，可使用伪卫星系统扩展其使用范围，全球定位系统信号发生器是其中的关键组成设备。
GPS pseudolites systems were employed to extend the availability of GPS when satellites signals were not seen. GPS signal generators were the core part of pseudolites system.
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