English to Chinese Tech/Engineering Computers: Systems, Networks

Antennas Everywhere
802.11n's predecessors are already here, but don't get trapped by proprietary systems.
Signal Strength: Smart Antennas and MIMO
802.11n will happen, and the IEEE's target of late 2006 seems realistic. The only hurdle to overcome is the choice between the rival proposals, which are so similar that a compromise should be possible. But watch out for proprietary "Pre-N" equipment.
Officially, nothing has been announced about the high-speed 802.11n standard, except that it's at least two years away and will mean Wi-Fi networks that reach speeds of 100Mbits/sec or higher. Unofficially, almost everyone in the industry agrees how it will work, and some vendors are already shipping "Pre-N" equipment.
Network architects should be skeptical of the official silence and even more skeptical of vendors that claim compatibility with a non-existent specification. While the core technologies set for inclusion in 802.11n are no secret, the IEEE's goals are so ambitious that a lot more innovation is required.
这是祈使句吗？什么样的语气？