?记住
... question不懂的题目 to learn by heart记住,掌握 laboratory assistant,lab assistant测试员 ...
?掌握
... （老师）上课 to teach 记住，掌握 to learn by heart 复习 to revise，to go over ...
?把握
... to study 进修 to learn by heart 记住,把握 to revise, to go over 复习 ...
牢记在心
牢记；掌握
remember??/??hold in hand
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。