fallback + noun (plan/option/position)
fallback 可直接作定语修饰名词，表示“备用的”，如 fallback plan、fallback option、fallback position。
Always have a fallback plan before you quit your job.
辞职前一定要有一个备用方案。
后退；撤退；回降物；放射性沉降物；沥青软化点降低；后退；撤退。；中止与敌人的军事行动
A backup plan or alternative that can be used if the main plan fails.
后退；撤退。
An act of falling back.
中止与敌人的军事行动
to break off a military action with an enemy
后备计划或应急策略；主计划出问题时的替代方案；退路。
A backup plan or contingency strategy; an alternative which can be used if something goes wrong with the main plan; a recourse.
相对密闭容器中沥青软化点的降低,有时称为回流或过热。
A reduction in bitumen softening point, sometimes called refluxing or overheating, in a relatively closed container.
核爆炸后落回地面的粉末状物质；放射性沉降物。
Pulverised material that falls back to earth after a nuclear explosion; fallout.
We have a fallback plan in case the first one fails.
我们有一个备用计划，以防第一个失败。
用法提示：fallback作名词，表示‘备用方案’。
The army's fallback was well-organized.
军队的撤退组织得很好。
用法提示：fallback作名词，表示‘撤退’。
His savings are his fallback in times of need.
他的储蓄是他在需要时的依靠。
用法提示：fallback作名词，表示‘可依靠的东西’。
fallback 可直接作定语修饰名词，表示“备用的”，如 fallback plan、fallback option、fallback position。
Always have a fallback plan before you quit your job.
辞职前一定要有一个备用方案。
as a fallback 表示“作为退路、作为备用方案”，常与 keep、have 等动词连用。
She kept her old apartment as a fallback in case the move didn't work out.
她把旧公寓留作退路，以防搬家不顺利。
fallback 在此为可数名词，多用单数，there is no fallback 表示“没有退路、没有备用方案”。
There is no fallback if the main server goes down.
如果主服务器宕机，就没有备用方案了。
grammar · medium
易错句子If the new system fails, we will fallback to the old one.
正确表达If the new system fails, we will fall back to the old one.
表示“退回到、转而依靠”时要用动词短语 fall back，两个词分开写；fallback 是名词或形容词，不能当动词用。汉语里“退回”没有词性标记，学习者容易把名词和动词混用。
grammar · medium
易错句子We need fallback in case the main plan fails.
正确表达We need a fallback in case the main plan fails.
fallback 作名词是可数名词，单数形式前必须加冠词，a fallback 才表示“一个后备方案”。汉语名词前不用冠词，所以学习者常漏掉 a/the。
fallback 指主计划失败后可以依靠的替代方案或退路，常作可数名词，如 a fallback option；backup 更强调备用的人、物或副本，如 a backup singer/copy，作定语时常说 backup plan。
fallback 是主方案失败后可启用的备选方案本身；contingency 指未来可能发生的意外事件，或为应对意外做的安排，常说 contingency plan，不直接说 a contingency 作“退路”。
fallback 是可数的替代方案或退路；recourse 指困境中可求助的人或途径，多用于 have recourse to，不能直接替换 a fallback option。
Choose the next layer that will help you use fallback with more confidence.
Recommended next
Missing: Collocations
Complete this area with collocations.
Includes Context & register & Memory tip
Analyze the context and learn memory tricks to remember it.
More ways to explore
Includes Synonyms & Antonyms
Expand your vocabulary with synonyms and antonyms.
Includes Spelling & sound
Explore words with similar spelling endings or sounds.
Includes Word components & Thematic vocabulary
Learn how to build related words using roots, prefixes, and thematic clusters.
Includes Idioms & Cultural references
Discover idioms, slang, and famous pop culture quotes.
Dictionary facts from ECDICT, WIKTIONARY.