常見例句Then, with a Bunsen burner, the surface is thoroughly seared.然后，用本生燈徹底燒灼表面。First, open the clamp or valve so that biogas can flow back from the balloon to the Bunsen burner.首先，打開鉗或閥，使沼氣可以回流從氣球的本生燈。 返回 Bunsen burner