bus broke down twice in one single day…
I bought a drinking bird online few days back.
While the mechanism of this toy is not complicated, it involves quite a
bit theories from chemistry, physics and thermodynamics. A side note:
it works well but that bird “drinks” more water than I thought everyday.
最近小弟在網上買了隻飲水鳥。儘管這玩具的設計十分簡單，唯其背後效妙地運用了不了化學，物理和熱力學的理論。這支小鳥每天可飲不少水呢! 詳細介紹在: http://zh.wikipedia.org/wiki/饮水鸟 。