在纸板上涂两三层清漆使其变硬。Give the cardboard two or three coats of varnish to harden it.这种材料需要有更高的温度和压力才能凝结变硬。The material requires higher temperatures and pressures to set hard.雪成冰后变硬了.The snow hardened until ice was formed....
令人难解的是, 他竟一直保持沈默.Unaccountably, he kept silent.脚注阐明了文中难解的段落.Footnotes illuminated the difficult passages of the text.有些谜语看似难解，可一旦知道了谜底其实十分简单。Some puzzles look difficult but once the solution is known are actually quite s...
克拉默愤愤地骂了一句脏话。Cramer spat an obscenity.克拉默尔提供的情报,似乎能使如饥似渴地想获取情报的德国人直接窥探到同盟国的意图.Kramer could submit what seemed to the information - starved Germans to peer direct into the Allies'minds....