本课程将包含十二个实验操作，每一次大约两个小时。

There will be 12 laboratory sessions in the course, each lasting approximately 2 hours.

youdao

本课程将包含十二个实验操作，每一次大约两个小时。

There will be 12 laboratory sessions in the course, each lasting approximately 2 hours.

youdao