同类粒子可以具有完全不同的特征，而这取决于粒子所在的层位。
The same type of particle can take on entirely different characteristics, depending on which layer it is in.
在对罹患不同类型肿瘤患者进行临床试验的第一阶段，研究小组在21天内用30分钟静脉输液的形式给患者施用了四次针对性纳米粒子剂量。
In a phase 1 clinical trial in patients with various types of tumors, the team gave doses of the targeted nanoparticles four times over 21 days in a 30-minute intravenous infusion.
“圆筒长度”表现在粒子的前面上的想像圆筒的长度，你能想像一个同类一个感应器。
"Cylinder length" represents the length of an imaginary cylinder on the front of the particles, you can imagine this like a sensor.
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