常見例句雙語例句Keep the barbecue pit on a flat surface in an open area. Be sure your outdoor fire extinguisher is close to your barbecue pit.所以請在一個寬闊的平地上做燒烤，并確保周圍有滅火器。The heavily dependence of spectra or cospectra on height, which exists in flat, uniform, and open underlying surface, disappears in the complex terrains.和平坦、均一、開闊下墊面不同的是譜的峰值頻率向高頻移動，且沒有發(fā)現(xiàn)近地層具有的譜峰隨高度的明顯變化關(guān)系。 返回 open flat surface