大陆漂移的第一个概念早在1910年就浮现在我的脑海中，当时我在观察世界地图时，受到大西洋两岸海岸线吻合的直接印象的启发。

If you worried about falling off the bike, you'd never get on.

Blow, winds, and crack cheeks! Rage!Blow!

The way a child holds a book tells you everything about how they feel about it.

教学应始终适应学生的发展阶段。