penumbras

penumbras的基本解释

n.

黑影周围的半阴影( penumbra的名词复数 ), 半影, 边缘, 外围

与penumbras相关的网络例句 [注：此内容来源于网络，仅供参考]

Surrounding shadow, many penumbras asked it with curiosity, You lie down and then sit up.

罔两们围著影子好奇地问：「我们看你一会儿躺下去，一会儿坐起来。一会儿仰著头，一会儿低著头。

In the United States, the right to refuse medical treatment is a constitutional right protected by a right to privacy and self-determination found in the penumbras of the Fourteenth Amendment.

然而拒绝接受治疗的权利在美国是被联邦最高法院承认为宪法第十四增补条款所涵盖。

What peaches and what penumbras!

多美的鲜桃，明暗交加多么诱人！

The point doses at the inferior beam edge for the two energies were 31.2% and 32.4%, respectively. There were 47-54% dose increase for superior beam edge and 37.6-35.2% dose decrease for inferior beam edge, as compared to the 50% field edge dose with the static dose distribution. There were 8.5 and 7.5 mm range increase for superior beam penumbras and 5.5 and 4.5 mm range increase for inferior beam penumbras, an important result corresponding to treatment volume.

结果：以正常人的平均值为例，在一个照射时距内，使用6 MV及18 MV光子射束， 10X10cm2照野10cm深度之中心轴下，照野上缘的剂量，分别为照野中心点剂量的73.5 %及77.2 %，照野下缘的剂量则分别为中心点剂量的31.2 %及 32.4 %，此剂量反映出因治疗中的呼吸位移，造成照野上缘较照野中心点有47 –54 %的剂量增加，及照野下缘有37.6 %- 35.2 %的剂量减少，相对照於静止态下照野边缘为中心点50 %剂量的状态。