demarcation造句
It was hard to draw clear lines of
demarcation between work and leisure.
在工作和闲暇之间很难划出明确的界限。
Talks were continuing about the
demarcation of the border between the two countries.
关于两国之间边界划定问题的谈判仍在继续。
A sharp
demarcation of adventive embryos from zygotic embryos cannot be drawn.
不定胚与合子胚之间不能划分出明显的界限.