There were 12 lectures, 6 of which were added that were optional lectures.
共有12节课,其中6节是,补充的选修课。
Oh, by the way, talking about under enrolled subjects, the complementary subject offered by STS called History, Society, and Solid State Chemistry meets Tuesdays and Thursdays at 11:00 in room 2-136.
顺便说一下,关于已经选了的课,由STS开设的补充课程,历史课,社会社和固体化学课,在2-136教室的11点,在周三和周四上。
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