It is not necessary to enroll before the course starts.

不需要在课程开始前注册。

youdao

Please enroll with the secretary before Friday this week.

请在本周五之前到秘书处登记。

youdao

So you'll just enroll in a thesis seminar for the second semester.

所以你只需要在第二学期报名注册一个论文研讨会就可以了。

youdao

They do not have Thai citizenship or language skills - making it difficult for them to enroll in Thai schools.

VOA: standard.2010.02.24

Fourteen-year-old Nam Gao says that when she moved to Thailand three years ago, her parents tried to enroll her in a Thai school.

VOA: standard.2010.02.24

For most of them,everything's rosy. Once dismissed as lowly junior colleges and commuter schools in urban areas where students could walk or take public transit to class, these two-year colleges are attracting tens of thousands of students who would normally enroll in four-year private or state universities.

VOA: standard.2009.12.14

Additionally, the survey found, the growth of part-time MBAs has helped more women enroll -- at 56% of the schools surveyed have seen more female students sign up.

CNN: Survey shows boom in part-time MBAs

My hunch is that many feel confused about how these accounts work and others simply forget to re-enroll (you must opt-in to these accounts every year).

FORBES: Avoid These 4 Critical Mistakes During Open Enrollment

Under the new law, employers can actually contribute a slightly lower match to each worker's 401(k) without having to pass complicated "nondiscrimination" tests, provided they automatically enroll workers--meaning employees have to opt out of, rather than opt into, a plan.

FORBES: Attention 401(k) Slackers!