A puzzling or perplexing question.

谜语；难解的问题。

A person or thing that is difficult to understand; an enigma; a mystery.

难了解的人或物；闷葫芦；神秘。

To explain; solve.

解释；解决。

Please, riddle me this.

请帮我解开此谜。

To speak in riddles.

语意难解。

A coarse sieve.

粗筛。

To sift through a coarse sieve.

以粗筛筛。

To pierce with holes in many places.

把...打得满是窟窿。

To disprove, refute successfully.

驳斥；驳倒。

To permeate.

渗入。