石灰岩上有许多缝隙，故而树根能从岩洞顶部长出来。The limestone is sufficiently fissured for tree roots to have breached the roof of the cave.同时还在这些大石灰岩洞里开采水泥原料。The large limestone caves are also quarried for cement.水沿着地下岩洞流淌。Water trickles throu...
Also , try to avoid abbreviations. If you must abbreviate, use standard abbreviations.避免用缩略语, 如果必须, 要用标准缩略语.We shall abbreviate'directed graph'to digraph.我们将把“有方向的图”简称为方向图.She had lost the power to abbreviate t...
Drag onto the page. Drag the yellow diamond to resize keyway.拖到绘图页上. 拖动黄色菱形可调整键沟的大小.Was the keyway created using a min arc condition dimension of .0.63?键槽的生成是用了0.63最小圆狐的尺寸条件.Drag onto the page. Right - click to edit keyw...