| 词汇 | undetectable |
| 释义 | undetectable adjective uk /ˌʌn.dɪˈtek.tə.bəl/ us /ˌʌn.dɪˈtek.tə.bəl/ impossible to notice or discover: The moons of Jupiter are undetectable by the naked eye. The medication he takes every day has reduced the amount of virus in his bloodstream to undetectable levels. The effect is so small as to be almost undetectable. Several athletes confessed to using undetectable performance-enhancing drugs. A 5 percent voltage reduction is virtually undetectable by customers. Radio astronomy is the study of radio waves emitted by objects in space that may be otherwise undetectable. Finding and discovering ascertain break (fresh/new) groundidiom breakthrough bring something to lightidiom catch someone red-handedidiom flush someone/something out fossick found geocache geocaching homing pinpoint plumb rake something out red-handed rediscover rediscovery refind sniff suss |
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