If life were all one dead level the dull sameness it would oppress us; we want the hills and the valleys.
若是我们前面的生活只是平而又光，何等乏味！我们需要山和谷。
Flat roofs may either be dead level or (preferably) have some degree of pitch to them so that rainwater and melted snow can drain away.
平屋顶可以为完全水平，也可以(这样更好)具有一定程度的坡度，以便雨水或融雪得以排除。
Flat roofs may either be dead level or (preferably) have some degree of pitch to them so that rainwater and melted snow can drain away.
平屋顶可以为完全水平，也可以(这样更好)具有一定程度的坡度，以便雨水或融雪得以排除。
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