在线词典
在线词典，是一款在线使用的中英文查词词典。本工具支持查询英文和中文单词及词组的含义，查询效率高、结果丰富，包括单词变体、常用短语、英英释义、同义词、同根词、词语辨析等，是外语学习者必备的在线查词工具。
输入要查询的单词：
back-up
n.
援助，帮助；后备人员，备用物品；备份，副本；堵车
adj.
备用的，后备的；备份的
查看英英释义
n.
an accumulation caused by clogging or a stoppage
同义词：backup
someone who takes the place of another (as when things get dangerous or difficult)
a subordinate musical part; provides background for more important parts
(computer science) a copy of a file or directory on a separate storage device
the act of providing approval and support
v.
give moral or psychological support, aid, or courage to
move backwards from a certain position
establish as valid or genuine
make a copy of (a computer file) especially for storage in another place as a security copy
同义词：back up
become or cause to become obstructed
网络释义
备份
SQL Server数据库安全备份和恢复策略 - 软件测试网 _领测软件测试网站-中国软件测试技术第一门户 关键词：数据库 备份 恢复 [gap=254]Keywords：database back-up restore
后备
... Interrupt中断 Back-up后备 Ionexchanger离子交换器 ...
垫板
... Back Light（Back Lighting）背光法 Back-UP 垫板 Backpanels/ Backplanes 背板、支持板，厚度较厚， ...
常用短语
更多常用短语正在查询...
{error}
你是不是想查找：
- {typos}
{word}
{phones} {trans} {trans_ee} {exam_types}{web_trans} {variants} {phrases} {synonyms} {rels} {discriminations} 查词链接：
{link}复制链接{phones}
{text}：[{value}]{trans}
{trans}
{pos}
{tran}
{tran}
查看英英释义
{trans}
{pos}
{list} {tran}
{words}{word}同义词： {words}
{pos}
{words}
{exam_types}
单词变体
- {variants}
常用短语
- {phrases}
网络释义
{web_trans}
{tran}
{detail}
近义词
{synonyms}
{pos} {tran}
{words}
同根词
{rels}
{pos}
{words}
{word}{tran}
词语辨析
{discriminations}
{num}、{title}
{description}- {usages}
{description}