Inert gases like neon and argon have eight electrons in their outer shell.
像氖和氩这样的惰性气体，在它们的外电子层有8个电子。
《柯林斯英汉双解大词典》
2
Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert.