因此能量是呈放射状的，对称的，等效全向的辐射，向各个方向，因此很简单。
And so that energy goes out radially, symmetrically, isotropically in all directions, and so it's very easy.
对于是否有骨转移，这需要全身核医学扫描来判别。转移的部位对放射性物质更多的吸收，而且是非对称的。
Whole-body nuclear medicine bone scanning allows for the detection of bony metastatic disease, which is usually identified by multiple asymmetric areas of increased uptake.
放射状对称的动物，囊状身体覆有刺样结构的触须，只有一个开口；它们以珊瑚和水母的形式出现。
Radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms.
应用推荐