Test tube rack
[医] 试管架
🧩 词语组成解析
rack
[ræk]
n. 行李架;支架;刑架;（羊、猪等带前肋的）颈脊;
vt. 使痛苦，使焦虑;剥削，榨取;用刑拘折磨;
🗣️ 情景例句
Have you been here to see Dr. Tyler before?
你曾来过泰勒医务所看过医生吗？
Nothing gives me more pleasure than learning English.
再也没有什么比学英语更让我高兴的事了。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。