stealth/stelθ; stɛlθ/ n[U]acting or behaving in a quiet or secret way 悄悄的或秘密的行动 Tracking wild animals requires great stealth. 跟踪野生动物必须悄然无声. The burglars had entered the house by stealth. 窃贼偷偷进了那座房子.
牛津英汉双解词典