实用型礼物可以是钱包、手袋、皮夹、手机、腰带、钥匙链、个人备忘录、MP3以及香水等等。
Some practical gift ideas include a purse or handbag, wallet, mobile phone, belt, key chain, personal organizer, MP3 players and perfume.
根据光的衍射原理和莫尔图像编码原理，实现了无钥匙位相型双图像莫尔编码技术。
According to the theory of light diffraction and that of moire image encoding, a new technology of double image encoding using non key phase only moire method is presented in this paper.
有趣的是，作为安全装置，我得到了一个智能钥匙扣型的小发射器，上面有一组数字，每几秒钟变化一次。
It is interesting that, as a security device, I was given a small transmitter which is a key chain lob and this has a number which changes every few seconds.
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