Only micronic particulates penetrate to the depth of the lung . 只有微细粒子穿透到肺深部。
2.
This destructive charge buildup can occur when high - energy particles penetrate spacecraft walls or protective shielding and then bury themselves in the dielectric semiconductor materials in microelectronics or solar cells 高能量粒子穿透太空船外壁或保护层，停留在微电子装置或太阳能电池的介电质半导体材料中时，往往会发生毁灭性的电荷积聚现象。
3.
The alpha particles released from polonium - 210 have a very low penetrating power and can be stopped easily by the outer layer of skin or a sheet of paper . it is unlikely that the particles can affect human body through direct irradiation . however the ionization power of alpha particles is very high 钋210释放的阿尔法粒子穿透能力很弱，人类的皮肤或一张纸已能隔阻它，粒子经照射影响人体的机会很微，不过由于它的电离能力很强，如果人类吸入或进食含有钋210的物质，其释放的阿尔法粒子就能直接破坏内脏细胞，即使所吸收的份量不多，也会损害身体健康，急性高剂量阿尔法辐射可以引致辐射中毒。
