资源的稀缺将以价格来体现，价格会上涨，直至有效的能源替代出现。
Scarce resources will be the price to reflect the price will rise, until the emergence of effective energy alternative.
程序将不断循环，直至输入匹配字符的有效密码和总输入时间。
The program will loop continuously until a valid password in character matching and total time of entry is entered.
然而直至今天，如何有效使用多媒体辅助教学提高教学功效，仍然是一个值得研究的问题。
But until today, how to effectively use the auxiliary multimedia teaching to improve the teaching effect, is still an issue that is worth studying.
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