Dorsimesal
[醫(yī)] 背中線的
??? 情景例句
Please do the work at your own convenience.
請在方便時把這事做一做。
Knowledge advances by steps and not by leaps.
知識只能循序漸進，不能躍進。
Without it, nothing could ever be brought to a conclusion; everything would be in state of chaos.
不準時將一事無成，事事都會陷入混亂不堪的境地。