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注射器是医疗上不可少的器材，在自然实验中亦有妙用。例1：将装有红色水的注射器和细玻璃管，用橡胶管连接起来，在三合板上标出刻度，可制成简易温度计模型（附图一（1）。例2：用注射器和细玻璃管抽出被密封在玻璃瓶中的气体，然后把玻璃管插入水中可作喷泉实验（附图一（2
Syringes are medically essential equipment and are also magical in natural experiments. Example 1: The syringe with red water and the thin glass tube were connected by a rubber tube and the scale was marked on the plywood to make a simple thermometer model (Figure 1 (1).) Example 2: Syringe and fine glass Pipe out the gas sealed in the glass bottle, and then into the glass tube can be used for fountain experiments (Figure 1 (2