They marked the lines with a stick in the muddy yard.

他们在泥泞的院子里用棍子划线。

In general, however, there is no marked dividing line as to size.

然而，一般来说，没有明显的尺寸分界线。

Even EU sanctions against Moscow weren't enough to derail the plans completely, but today's statement on the eve of a Nato summit marked a clear line in the sand.

即使欧盟对莫斯科采取的制裁措施也不足以使计划完全脱轨，但是今天法国在北约峰会前发表的声明标志着法国非常明确的底线。