Jyutping
si4 jit6 si4 dung3
Pinyin
shí rè shí dòng
Definitions (粵典–words.hk)
形容詞
一陣熱一陣凍 sometimes hot and sometimes cold
香港天氣時熱時凍,好易病。
香港天气时热时冻,好易病。
hoeng1 gong2 tin1 hei3 si4 jit6 si4 dung3, hou2 ji6 beng6. It is easy to get a cold as the weather is sometimes hot and sometimes cold in Hong Kong.
Schools have a fixed calendar for switching between winter and summer uniforms, but I have no idea what to do with this hot-and-cold weather we've been having lately.