useful time
- useful time的基本解释
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使用寿命
- 相关中文词汇
- 使用寿命
- 更多网络例句与useful time相关的网络例句 [注：此内容来源于网络，仅供参考]
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Crust: It is made of natural import lauan, maple, Thailand-made black walnut, cherrywood, India-made ebony, etc., in addition, due to modern high-tech treatment technology, stable property, it can improve the resonance of piano and ensure the useful time of piano, it can be kept permanently and above the price in value.
外壳：精选天然进口柳安木、枫木、泰国产的黑胡桃木、樱桃木、印度黑檀木等，融合现代高科技处理技术，性能稳定，提升钢琴的共鸣效果，确保钢琴的使用寿命，永久收藏，物超所值。
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What's more, Elite Glue Liner can prolong the useful time of mackintosh.
并可有效的延长印版及橡皮布的使用寿命。
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Alkylation of phenol was used to research catalytic activity of Y/MCM-41. The results have shown that Y/MCM-41 has higher catalytic activity than the traditional Y and MCM-41. For the Y/MCM-41, not only the conversion of phenol raised with tert-butyl alcohol and reaction temperature raising, but also Useful time of Y/MCM-41 was longer. For the Y/MCM-41, the conversion of phenol raised with reaction time raising, But that increased slowly after 3 hours.
结果表明：Y/MCM一41分子筛具有比Y型或MCM一41更高的催化活性；而对于Y/MCM一41分子筛，随着叔丁醇和温度的增加，苯酚的转化率也增加，且使用寿命也较长；对于Y/MCM-41分子筛，随着反应时间的增加，苯酚的转化率增加，但反应3小时之后，苯酚转化率增加就不明显了。
- 更多网络解释与useful time相关的网络解释 [注：此内容来源于网络，仅供参考]
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play the fool/act the fool : to act like the idiot or foolishly：(胡闹,办傻事)
关于fool | play the fool/act the fool : to act like the idiot or foolishly(胡闹,办傻事) | fool around : to spend time doing nothing useful (虚度光阴,游手好闲)
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the most useful invention：最有帮助的发明
5. 闹钟 alarm clock | 6. 最有帮助的发明 the most useful invention | 7. 给人们更多时间工作 give people more time to work
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helpful a.useful;providing help or wiling to help：有益的;给予帮助的,肯帮忙的
permanent a. lasting for a long time; never changing 持久的;永久的 | technique n. way of doing sth. 技巧,方法 | helpful a. useful; providing help or wiling to help 有益的;给予帮助的,肯帮忙的