Lily20131010
roof英[ru:f]美[ruf,rʊf]过去式：roofed过去分词：roofed现在分词：roofing复数：roofsn.1.屋顶;顶部2.有…顶的3.洞顶；隧道顶4.口腔顶部；腭部5.（1）顶板（2）顶（巷道）6.（1）顶板（2）顶（巷道）7.（1）顶板（2）顶（巷道）vt.1.给…盖顶；盖上屋顶名词n.1.屋顶;顶部Theroofoftheburninghousefellinwithacrash.着火房子的屋顶哗啦一声塌下来。Itisdifficulttogetthemalltogetherunderoneroof.把他们都聚集到一起是困难的。2.有…顶的3.洞顶；隧道顶4.口腔顶部；腭部5.（1）顶板（2）顶（巷道）6.（1）顶板（2）顶（巷道）7.（1）顶板（2）顶（巷道）及物动词vt.1.给…盖顶；盖上屋顶
