English translation of '孜孜不倦'

• gray-crowned babbler
• gray duck
• grayed out
• gray eminence
• gray-faced petrel
• grayfish
• grayfly
• gray fox
• gray friar
• gray gum
• gray-haired
• grayhead
• gray-headed
• grayheaded
• grayhen
• gray heron
• gray import
• graying
• grayish
• gray jay
• gray knight
• graylag
• graylag goose
• grayle
• grayling