検索内容:
spring; stream; rivulet; brook / continuous flow of water from its source / source; origin; fountain
We saw the clean spring in the mountain.
secondary source
The secondary source of information is important in research.
tertiary source
The tertiary source is important in the ecosystem of the place.
primary source
The river is a primary source of water in our town.
アカウントを持っていませんか? 新規登録
アカウントを持っていますか? ログイン
DiQt(ディクト)
無料
★★★★★★★★★★