The only sound was the crackle of breaking ice.唯一的声响是冰层噼噼啪啪碎裂的声音。We heard the rapid crackle of automatic gunfire.我们听到自动枪炮发出快速的射击声.The crackle of the envelope in his hands was loud.信封拿在他手里发出很响的沙沙声....
胶卷或感光片应在日食前装入暗盒.The films and plates are put in their holders the night before the eclipse.他用的是照相暗盒, 最原始的相机.He used a camera obscura, which was a primitive camera.这种数字影像暗盒可以取代感光胶片式暗盒,实现记录飞机训练或作战信息的功能.The digital imaging ...