Plumbers caulk joints in pipe with lead, string or a caulking compound.管子工用铅 、 绳子或专用填隙材料使管子的接头不漏水.Older windows and doors require maintenance -- scraping, painting and caulking.旧门窗需要一系列维护,诸如, 刮磨, 上漆,勾缝.Caulking and weath...
Every day a different name was placed at the head of the chart.每天都有一个不同的名字被列在这张表的最上端。We are keeping our head above water, but our cash flow position is not too good.我们正努力避免陷入困境，但我们的现金流动情况不太好。He cracked his head on the pa...
A digraph D is unilateral.有向图D是单连的.We shall abbreviate'directed graph'to digraph.我们将把“有方向的图”简称为方向图.There fore we study the kings of locally semicomplete digraph by its characterization.文章通过研究局部半完全有向图的结构定理,分类讨论了...