In the famous Ritz hotel of London, afternoon tea needs reserving before hand; first class environment and service make it one of the important events of the hotel.
在伦敦著名的瑞兹酒店，喝下午茶要事先预订，一流的环境，一流的服务，使其成为酒店重要活动之一。
A paper from Science of the Total Environment shows that the largest freshwater fish in China might have gone extinct between 2005 and 2010. Wei Qiwei, author of the paper, said in September, 2019, some experts supposed that the first-class protected fish had been extinct already.
《整体环境科学》的一篇论文显示，中国最大的淡水鱼可能已经在2005年至2010年间灭绝了。2019年9月，该论文的作者危起伟表示，一些专家认为这种一级保护鱼类已经灭绝。
Figure 1 represents an "ideal" environment that includes all of the necessary stages for a first-class rigorous environment.
图1展示了一个理想的环境，它包括一流严格的环境的各个必需的阶段。
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