In order to meet the demand of involute spline's match, and simultaneously reduce the difficulty of process, a new machining way--- match machining is put forward.
为满足渐开线花键的配合要求，同时降低加工难度，提出了一种新的加工方法——现合加工法。
RSA cryptosystem, a public-key cryptosystem that being used widely today, seems to have difficulty to meet the user's need of higher security.
现在广泛使用的RSA公钥密码系统已很难满足未来人们对信息高安全性的需求。
The author will take the transplanting to plea-bargain as a tropical case to study and tell us which difficulty we will meet when transplanting.
从辩诉交易移植这个研究个案出发，可以揭示习惯法移植的困境。
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