test charge

例句：

1. 1. The battery needs to be charged before it can be used.
   电池需要充电才能使用。
2. 2.The scientist conducted a series of tests to determine the effectiveness of the new drug.
   科学家进行了一系列的测试，以确定新药的有效性。
3. 3. The test charge was released into the chamber and the results were recorded.
   测试电荷被释放到腔室中，结果被记录下来。