不易发现的 not easy to find
不易被发现的未暴露的 undetectable
不容易被发现 Is not easy to find ; Not hard to find
一个来之不易的发现 a hard-won discovery
这个不易发现的竞态条件是rand存在内部状态。
冉阿让的特长便是能直登陡壁，在不易发现的凸处找出着力的地方。
To climb a vertical surface, and to find points of support where hardly a projection was visible, was play to Jean Valjean.
由于系统结构设计不当造成的系统性能瓶颈不易发现，往往到最后的系统测试阶段才被暴露。
System performance bottlenecks which caused by unsuitable system architecture design hard to discover until the last system integration test phase.
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