Your colleagues will respect you for having the guts to admit your lack of knowledge about something.

你的同事会因为你有勇气承认自己在某方面的知识不足，而对你心生敬意。

youdao

Inertia is a lack of guts, a fear of failure: People are afraid to lose their jobs.

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The worm's closest relatives, which also lack guts and mouths, live in deep-sea hydrothermal vents and rely on a different set of bacteria to allow them to survive in these hot and acidic conditions.

MSN: Zombie worm has no mouth �� but it feasts on whale bones