倒数60天考试
1.grapple 抓住，与……格斗
grapple with 努力克服，扭打
students grapple with many issues in...
2.cram填鸭式的，填满塞满，拥挤，死记硬背
it helps not to cram
3.preoccupy先占，迷住使全神贯注
come back to it when you are not preoccupied
使日思夜考，忧心忡忡
4.conducive
be conducive to有益于
5.digest n.文章摘要，abstract
吸收消化理解
compilation编译
6.boil down to
be attrituded to
be due /owned to
7.cognitive认知的
8.stumble犯错，困惑，绊倒，蹒跚
stumble across/on/upon意外发现
stumble into涉足
9.breadth 宽度，知识的广度
understand breadth of content and types of questins to expect
10.hassle 麻烦，激战
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