Moreover, this kind of pumping unit can be started in the condition of zero-load and run in the condition of full-balance.
该机整机结构简单、受力均匀、运行平稳、可靠性高，并能实现完全平衡和空载启动。
If available RAM is approaching zero at any time during load, your system performance is limited by RAM.
如果可用RAM在任何时刻接近零，则系统性能将受到RAM的限制。
The lines shown in Listing 1 tell PHP to load the Zero extensions.
清单 1 中的代码行让 PHP 装载 Zero 扩展。
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