“constance”简单造句，constance造句子

1、I'm ms. Queller, The new headmistress at constance. It's unfortunate that we meet under these circumstances.

3、In this circuit, some measures are adopted, such as making constant current source as a rectifying load. It makes the voltage drop of the rectifying diode maintain a constance.

2、Search a new method in refing leaves of Ginkgo Biloa L Flavone Gruff bring up substance-the method is constance elution speed RP-HPLC gradiant elution.