Cells can also develop mutations in the thrombopoietin receptor, MPL, or in the chaperone protein, Calreticulin or CalR.

细胞内促血小板生成素受体（MPL）或伴侣蛋白/钙网蛋白（CalR）也可以发生突变。

Engineers at Johns Hopkins’ Applied Physics Laboratory have been developing a device called a Modular Prosthetic Limb, or MPL, which is an incredibly functional robotic arm.

约翰霍普金斯应用物理实验室工程师正在开发一种名为模块化肢（MPL）设备，这是一种极其功能强大机械臂。

So, even though the patient didn’t need a prosthetic arm, researchers working on the MPL were able to use the information from his sensors to program their device.

因此， 即使患者不需要肢手臂，从事模块化肢研究科学家也能利用传感器数据来编程设备。

In 2014, this surgery allowed a patient, who lost both arms as a teenager, to wear and control two MPLs and perform basic tasks by just thinking about them.

2014年，这项手术让一名在青少年时期失去双臂患者能够佩戴并仅通过思考来控制两只模块化肢，并完成基本任务。