convenience比较级是:
more convenientA bicycle is often more convenient than a car in towns.
在城镇骑自行车常常比开车更方便。
For convenience one set may be starred .为方便起见，一组以星号表示。
The nearest public conveniences are in west street .最近的厕所在西街。
Please send her the book at your convenience .这本书，请你得便捎给她。
Please send the goods at your earliest convenience .请将货物尽速寄下。
Consult your own convenience in this matter .此事可以听你自便。
