The direct cause is the emerging aTM-based BISDN and the advent of aDSL, the shortened form of asymmetric digital subscriber loop.
直接的原因则是最近问世的aT M型宽带ISDN和不对称数字用户回路。
The direct cause is the emerging aTM-based BISDN and the advent of aDSL, the shortened form of asymmetric digital subscriber loop.
直接的原因则是最近问世的aT M型宽带ISDN和不对称数字用户回路。
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