When he came to the fireplace, he used shorter logs.

当他来到壁炉旁时，他使用了较短的原木。

I threw some short logs into the furnace, where I don't know what was steaming, exhaling a suffocating odour.

我把一些短木头扔进了炉子里， 炉子里不知冒着什么热气， 散发着令人窒息的气味。