5、il英[treɪl]美[trel]vt.追踪;拖;蔓延;落后于n.小径;痕迹;尾部;踪迹vi.飘出;蔓生;垂下;拖曳短语onthetrail追踪,寻找;在山径上audit【'ɔːdɪt】trail审查跟踪,尾随审查;查帐索引;逐位跟踪followthetrail顺着足迹intrailadv.成一列纵队;挨次onthetrailof跟踪追赶ExampleTheroad pinched【pɪntʃt】down to a trail.大路渐渐变窄,成了羊肠小道She and some tramps found the trail of rabbit.她和一些流浪者发
6、现了野兔的踪迹。The winding trail caused us to lose our orientation. 【orɪɛn'teʃən】迂回曲折的小道使我们迷失了方向。explosive英[ɪk'spləʊsɪv;ek-]美[ɪk'splosɪv;ɪk'splozɪv]adj.爆炸的;爆炸性的;爆发性的n.炸药;爆炸物ExampleThe bomb and other explosive exploded.炸弹和其他爆炸物爆炸了。They rammedan explosive chargehome anddetonated it by remote
7、control.他们装好炸药,然后以遥控的方式将其引爆。The explosive mixture in a rocket consists ofbotha fuel and asupplyof oxygen.火箭中的爆炸性混合物由燃料和氧气构成。indicate英['ɪndɪkeɪt]美['ɪndɪket]vt.表明;指出;预示;象征短语indicateleft打左转向灯;打左灯;显示左;表明左indicaterelationship指示关系;表明关系;表示关系TestIndicate经实验ExampleIt comesas no surprise to y