〔R29〕  What is round as a dishpan, not so deep as a tub, and still the oceans couldn't fill it up?

〔譯註〕 什麼像洗碗桶一般圓，不像浴盆那麼深，而海洋仍舊都不能把它裝滿？

〔提問〕 If it is a utensil (用具) with many small meshes (網狀的), perforated (到處有孔的) openings, what is it?

〔謎底〕  s____