Definition: not able or not likely to cause harm Level: B2
小剂量服用时，这种药物是完全无害的。
This medicine is ___harmless when taken in small doses.
许多人认为汽车本质上无害，但这并不完全正确。
Many people believe that cars are essentially ___harmless, but this isn't entirely true.
我们的宠物兔子很温顺，完全无害。
Our pet rabbit is gentle and completely ___harmless.
