Water is an important resource on which mankind rely for existence indispensably.
水是人类赖以生存和不可缺少的一种重要资源。
Cooperative consciousness and teamwork spirit are indispensably basic competence needed in modern society.
合作意识、团队精神是现代人不可缺少的一种基本素养。
Boiler is an indispensably important power equipment in industrial process of chemical, oil and power generation.
锅炉是化工、炼油、发电等工业生产过程中不可或缺的重要动力设备。
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