Problemist
n. 棋题设计(或研究)家
🗣️ 情景例句
No sweat.
小事儿。
I ought to tell him the whole story.
我应该告诉他整个事情的始末。
An electric razor that meets the European Union's safety standards must be approved by American testers before it can be sold in the United States,
一把符合欧洲联盟安全标准的电动剃须刀必须得到美国检测人员的认可，方可在美国市场上销售；