a sudden abrupt pull
同义词：jerk
a powerful small boat designed to pull or push larger ships
同义词：tugboat??/??towboat??/??tower
pull hard
strive and make an effort to reach a goal
同义词：labor??/??labour??/??push??/??drive
tow (a vessel) with a tug
carry with difficulty
同义词：lug??/??tote
move by pulling hard
pull or strain hard at
struggle in opposition
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。