任务: assignment; mission; task; duties; job 短语和例子接受任务 receive an assignment; accept an assignment; 担负艰巨的任务 shoulder heavy responsibilities; 我们保证完成任务。 we guarantee to fulfil [complete] our missi
对称: symmetry; symmetrical 短语和例子放射对称 radial symmetry; 镜面对称 mirror symmetry; 左右对称 bilateral symmetry; 大楼的两翼完全对称。 the two wings of the building are exactly symmetrical.; 对称比 cylindricizing; 对称变换
