Blood in the stool does not necessarily indicate cancer but requires follow-up.

粪便中发现有血并不一定是癌症，但是需要做进一步的检查。

But U. S. admissions officers are keenly aware that elevated TOEFL scores do not necessarily indicate truly superior command of the language.

但是美国入学官员们敏锐的觉察到升高的托福成绩并不必然意味着真的能够很好的掌握这门语言。

Records also show that funds for population control increased rapidly and dramatically during the Reagan and Bush years, but this did not necessarily indicate a new NSC direction.

记录显示在里根和布什执政的年份人口控制资金迅速增长，增幅较大，但那并非就意味着新的NSC方向。