plateaus

柯林斯詞典

1. N-COUNT A plateau is a large area of high and fairly flat land. 高原
A broad valley opened up leading to a high, flat plateau of cultivated land. 一個(gè)寬闊的山谷展開，通向一片平坦的高原耕地。
2. N-COUNT If you say that an activity or process has reached a plateau, you mean that it has reached a stage where there is no further change or development. (不再有變化或進(jìn)展的) 穩(wěn)定階段
The U.S. heroin market now appears to have reached a plateau. 美國(guó)的海洛因市場(chǎng)目前似乎已進(jìn)入了一個(gè)穩(wěn)定階段。