1. abide by(=be faithful to ; obey)忠于;遵守。 2. be absent from. 缺席，不在 3. absence or mind(=being absent-...[查看全文]
The Sea What do you know about the sea? We know that it looks very pretty when t...
Dining Custom Every land has its own dining custom, and the United States is no ...
The Cold Places The Arctic is a polar region. It surrounds the North Pole. Like ...
Architecture Architecture is to building as literature is to the printed word. T...
Geology and Health The importance of particular metals in the human diet has bee...
Volts from the Sky Lightning has caused awe and wonder since old times. Although...