portable radiation survey meter

例句：

1. 1. This laptop is very portable andcan be easily carried around.
   这台笔记本电脑非常便携，可以轻松携带。
2. 2. The portablecharger allows you tocharge your phone anywhere.
   便携式充电器可以让你在任何地点为手机充电。
3. 3. The portableradio is great for outdoor activities where youneed to stay connected.
   便携式收音机非常适合户外活动，当你需要保持联系时。