test-tube stand

例句：

1. 1. The test-tube stand is essential for conducting experiments in the laboratory.
   试管架在实验室中进行实验时是必不可少的。
2. 2. The scientist used a test-tube stand to collect samples from the patient's blood.
   科学家使用试管架从病人的血液中收集样本。
3. 3. The test-tube stand was designed to support the fragile glass tubes during the heating process.
   试管架被设计来支撑在加热过程中易碎的玻璃管。