inapparent; implicit; Unconspicuous。
英文造句：
1、难题的另一个部分是用户目标和业务目标之间不明显的关系。
Another piece of the puzzle is the implicit relation between the user goals and the business goals.
2、从统计学的观点看，实验结果意义不明显。
The results of the experiment are not statistically significant.
3、通常不明显的疼痛在运动后会加剧。
The pain, usually a dull ache, gets worse with exercise.
4、过敏反应也可能会表现得很不明显。
Intolerance can take subtler forms too.
5、多数癌症早期症状不明显，容易被漏诊、误诊。
Most cancer has no obvious early symptoms, hence it is easy for it to escape diagnosis or be misdiagnosed.
6、但我们小时候觉得很明显的差异现在变得不明显了；我们对新的刺激、新的想法麻木了。
But distinctions that were sharp to us as children become unclear ； we are numb to new stimulation, new ideas.
7、相互竞争的品牌之间往往看不出明显的区别。
There is often no discernible difference between rival brands.