acidulous
[形容词]
slightly sour or acidic, not strongly so, often describing a mild tanginess

微酸的, 略酸的
Ex: The yogurt was acidulous, providing a nice contrast to the sweetness of the honey .
bumptious
[形容词]
too confident or proud in expressing oneself, in a way that is annoying to others

自以为是的, 傲慢的
spinous
[形容词]
(of some plants or animals) having sharp, needle-like things on the surface of their body

尖刺的, 刺状的
industrious
[形容词]
hard-working and productive

勤奋的, 努力的
Ex: He was known for industrious approach to business , always looking for new opportunities .
emeritus
[形容词]
keeping the title of their former position after retirement as an honor, especially of a university professor

名誉教授, 退休教授
indigenous
[形容词]
(of animals and plants) found and developed only in a particular place and not been brought from elsewhere

本土的, 地方性的
Ex: Orchids indigenous flowers that grow in diverse habitats around the world , from tropical rainforests to alpine meadows .
unctuous
[形容词]
characterized by excessive ingratiation or flattery, often in a way that seems insincere or manipulative

油腔滑调的, 谄媚的

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