形容词

1. The dog seems fierce, but he's harmless.
这狗看似凶狠，但不伤人。

2. Several harmless spectators were wounded during the rioting.
几名无辜的旁观者在骚乱中受了伤。

1. 無害的:降低疾病致命性：Stealthy秘密的:降低疾病明顯性. | Harmless無害的:降低疾病致命性. | Immune免疫的:疾病能免疫各種疫苗.

2. 无恶意的：H:hairless无毛发的 | harmless无恶意的 | headless无知的,无头的

1. 无害的;（尤指对健康）不造成伤害的
Something that is harmless does not have any bad effects, especially on people's health.

e.g. Industry has been working at developing harmless substitutes for these gases...
该行业一直在努力开发一些可以替代这些气体的无害物质。
e.g. This experiment was harmless to the animals.
这个试验不会对动物造成伤害。

adj

1. not causing or capable of causing harm

e.g. harmless bacteria
rendered the bomb harmless