例句與造句

1. The studies may indicate that an earthfill dam with a center concrete gravity overflow spillway section is the most economical, in a wide flat valley .
   方案表明，在寬闊而平坦的河谷內，一種在中間段設置混凝土重試溢洪道的土壩是最經濟的。
2. It's difficult to find overflow spillway in a sentence. 用overflow spillway造句挺難的