建造工人必须把新建房屋的屋顶固定得更牢靠些。Builders must fasten down roofs of newly-built homes more securely.地面摇晃，周围房屋的墙体在他们身边倒塌。The earth shook and the walls of neighbouring houses fell around them.许多房屋的卖主仍然陷在经济衰退的困境中。Many home sellers rem...