形容詞 in use:

1. (of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line)
   同義詞：busy, engaged
2. currently being used

1. The new version of this dictionary is not in use yet.
   這本字典的新版本還未通行。
2. Of equipment or an operation, unstable and error-prone; likely to fail or cause difficulty in use.
   用于描述這樣的設備或操作：它們不穩(wěn)定并且容易出錯; 它們可能失效或使用困難。
3. A person of mild mental retardation having a mental age of from7 to12 years and generally having communication and social skills enabling some degree of academic or vocational education. The term belongs to a classification system no longer in use and is now considered offensive.
   癡愚者一個人智能遲緩發(fā)展，僅具有7歲到12歲的智能，一般在一定程度的學術或職業(yè)教育后能夠進行交流和掌握社會技術。這個詞是一個集合概念，現(xiàn)在不再使用，并被視為帶有侮辱意味
4. A person of profound mental retardation having a mental age below three years and generally being unable to learn connected speech or guard against common dangers. The term belongs to a classification system no longer in use and is now considered offensive.
   低智商者指智力水平在三歲小孩以下，聽不懂連貫話語，也不會提防普通危險的智力有嚴重障礙的人。這個詞現(xiàn)在已不用來區(qū)別人的類型，現(xiàn)在被認為有對人不友好的意思
5. Seriously damaged, the bridge is no longer in use.
   因受到嚴重損壞，這座橋不再使用了。