Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/c3102f0adc552b6f16593882834e7270.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 preplan例句_preplan英汉例句_preplan双解例句_按摩法牛津词典
It is very important to preplan first aid and treatment for fluorine and hydro-fluoric acid exposures because of their unique properties. 因爲它們的獨特性質，對氟和氫氟酸暴露的急救和処理預先計劃是非常重要的。