be careful or certain to do something; make certain of something
同义词：see??/??check??/??see to it??/??ensure??/??control??/??ascertain??/??assure
make certain of
同义词：guarantee??/??ensure??/??assure??/??secure
protect by insurance
同义词：cover??/??underwrite
take out insurance for
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。