discretionary
英 [d?'skre?(?)n(?)r?]
美[d?'skr???'n?ri]
- adj. 任意的；自由決定的
考試真題
- In the 1960s, the United States devoted nearly 17% of discretionary spending to research and development, reaping decades of economic growth.
2016年12月六級(jí)真題（第二套）閱讀 Section A