optional termination 中文意思是什麼
optional termination
解釋
自主選擇終止- optional : adj 可自由選擇的；隨意的，任意的；非強制的 （opp compulsory）。n 〈美國〉選修科。 It is optional ...
- termination : n. 1. 末端，終點；終止，終結；結局，結束。2. 限定，界限，限度。3. 【語法】詞尾。adj. -al
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We plan to arrange two optional field trips as part of the conference program in the 4th dfhm conference : one will be a 4 - day pre - conference field trip to jiuzhaigou valley one of the world natural heritage sites, where visitors can see some counter - debris - flow structures built behind the natural beauty of the valley, and the other a 3 - day post - conference field trip to the dongchuan debris flow observation and research station in jiangjiagou valley known worldwide as a natural laboratory of debris - flow experiments, where visitors can observe all the stages of debris - flow behavior from initiation to termination if a debris flow occurs during the field trip
世界自然遺產地九寨溝的泥石流防治工程作為四天行程的會前考察，在這里泥石流防治工程與自然景觀巧妙溶合，渾然一體。三天行程的會后考察雲南省蔣家溝的東川泥石流觀測與研究站。對泥石流的觀測與研究已有40多年歷史的東川站，被世界各國的泥石流研究學者譽為「泥石流博物館」 。
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