?弄清楚
... make both ends meet 收支平衡，日子还过得去 make head or tail of 弄清楚 no better than to 几乎等于 ...
?理解
... knock on the head 使不可能实现 make head or tail of 理解 put out of one's head 不再想;放弃 ...
?了解
... 弄不清楚，数不清楚 lost count 弄清楚，了解 make head or tail of 弄清楚、查明 make sure ...
?彻底了解
... live up to 无愧于；做到；符合 make head or tail of 彻底了解 neck and neck (赛跑时)齐头并进 ...
理解；弄清楚
see??/??absorb??/??read??/??seize??/??assure oneself
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。