To make a transducer by painstakingly micro-machining a brittle block of ceramic material can take many hours of work, though.
但是制造一个换能器需要利用微机械技术,在一块质地脆硬的陶瓷材料上精心加工,耗费数个小时才能完成。
2
Oops.) Besides, using cookies or hidden form fields is messy, error-prone, and brittle (and a cookie-based approach won't work at all if the user has disabled the use of cookies in the browser).