单词：maintained
v keep in safety and protect from harm, decay, loss, or destruction
v supply with necessities and support
v state categorically
v have and exercise
v maintain for use and service
v maintain by writing regular records
v state or assert
v support against an opponent
v stick to correctly or closely
s kept in good condition
s continued in your keeping or use or memory
maintained的用法和样例：
例句
- Machinery ought to be well maintained all the time.机器应该随时注意维护。
- The pages are maintained as a doubly-linked list.这些页是作为双向链接表来维护的。
词汇搭配
- self maintained gas conduction自持气体导电...
- non self maintained discharge非自持放电
- self maintained discharge自持放电
- maintained contact switch保持接触开关...
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