While she sailed through her maths exams, he struggled...是什么意思？

While she sailed through her maths exams, he struggled...

她顺利地通过数学考试，而他却异常地吃力。

while

conj. 在…期间，与…同时，虽然，

例句
A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

sailed

v. 驾驶( sail的过去式和过去分词 )，起航，坐船旅行，掠；

例句
Giving them an airy wave of his hand, the Commander sailed past.
这位海军中校随意地朝他们挥挥手便扬帆而过。

through

prep. 通过，穿过，经由，透过，凭借；adv. 从头到尾，彻底，自始至终；adj. （电话）接通，通话完毕，有洞的，直达的；

例句
The proposal was instantly voted through with two to one in favour, accompanied by enthusiastic applause...
在热烈的掌声中，提案以2比1的优势很快通过了表决。

her

pron. (she的宾格)她，(she的所有格)她的，她，指某个国家，（一艘）船；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

maths

n. 数学，=mathematics（英）；

例句
Our maths teacher was a bully and a complete barbarian...
我们的数学老师是个坏蛋，一个彻头彻尾的野蛮人。

exams

abbr. examinations 考试；n. <口>考试( exam的名词复数 )；

例句
He's sitting his final exams in accountancy.
他正参加会计学的期末考试。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

struggled

v. 搏斗( struggle的过去式和过去分词 )，奋斗，努力，争取；

例句
There were signs that she struggled with her attacker before she was repeatedly stabbed.
有迹象表明，在她被连刺数刀前，曾与袭击者进行过搏斗。