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- By selectively amplifying key neural signals, these receptors help the brain respond to some messages and ignore others, thereby facilitating mental focus and attention. 这些受体将重要的神经讯号做选择性的放大，可帮忙大脑反应某些讯息，而忽视其他的，因此促进注意力的集中。
- I bought an amplifier yesterday. 我昨天买了一个扩音器。
- You may leave your key at the reception desk. 你可以把钥匙留在服务台。
- He put the key in the lock and turned it. 他把钥匙插入锁里转动。
- I have mislaid my key to the door. 我不知道把门钥匙放到哪里了。
- He's locked in and nobody knows where the key is. 他被锁在房间里，没有人知道钥匙在什么地方。
- Reading is the key to the treasure house of ideas. 读书是打开知识宝库的钥匙。
- I looked everywhere for my lost key. 我到处寻找我丢失的钥匙。
- She inserted the key into the lock. 她把钥匙插入锁中。
- The key turned halfway and then jammed. 钥匙转了一半就卡住了。
- The key to the whole affair was his jealousy. 整个事情的症结是因为他忌妒。
- Do you know the key to the problem? 你知道这道题的答案吗？
- Your scatty son has forgotten his key again. 你那儿子丢三落四又把钥匙给忘了。
- A gradual change in the output of a circuit or amplifier. 逐渐改变电路或放大器输出功率的逐渐改变
- I dropped my key somewhere about here. 我把钥匙掉在这附近某个地方了。
- Output from the inverting oscillator amplifier. 内部反向振荡放大器的输出。
- I dropped the key somewhere about here. 我把钥匙掉在这儿附近了。
- He dived into his pocket for his key. 他把手伸进衣袋里找钥匙。
- He gave me a duplicate key of his house. 他给了我另配了一套他房子的钥匙。
- As he picked up the envelope, a key dropped out. 他拣起信封时，一把钥匙掉了出来。
