The door opened and he distinctly saw six tiny but sharply defined figures walk over the threshold.

门开了，他清楚地看到六个很小但是轮廓分明的身影跨进了门槛。

This effect is difficult to understand for anyone who has never seen light beams so sharply defined on shore.

人们1只在陆地上看见过这种一道道的十分辉煌的白光，对于电光在海底下的作用，实在不容易了解。

The door opened and he distinctly saw six sharply defined figures walk over the threshold. The door closed again and there was silence.

门开了，他清楚地看到六个轮廓分明的身影跨进了门槛。门又关上了，接着是一片沉寂。

The bird has sharply defined black and rust markings.

【define，definable】这只鸟长着鲜明的黑色和铁锈色斑点。

The class structure in Virginia as in most of the southern colonies tended to reflect the sharply defined upper and lower classes found in Great Britain.

跟很多其他的南部殖民地一样弗吉尼亚的阶级斗争也非常激烈这也反应了大不列颠本国的阶级矛盾。

He steadied himself, his world dominated by the passage of that sand-clouded curving wall, that segmented cliff, the ring lines sharply defined in it.

他稳住了自己，他的世界被沙尘笼罩的弯曲墙壁的通道所主宰，那个分段的悬崖，其中清晰地定义了环形线。

He wears dark bluish-gray over the back and half-way down the sides, bright buff on the belly, with a stripe of dark gray, nearly black, separating the upper and under colors; this dividing stripe, however, is not very sharply defined.

他身穿深蓝灰色衣服，背部和两侧半身穿，腹部是亮黄色，有一条深灰色条纹，几乎是黑色，将上衣和下衣分开；然而，这条分界线并不是很明确。