watchtower的复数形式怎么拼写？

Standing in the watchtower, we admired the surrounding scenes.我们站在碉楼上, 欣赏四周的景色.The watchtower followed the aircraft by radar.了望塔通过雷达追踪这架飞机的飞行.If it isn't, why do they renovate the watchtower?要不然, 为什么他们要修复了望塔?...

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watchtower的音标：watchtower的英式发音音标为：['wɒtʃtaʊə(r)]watchtower的美式发音音标为：['wɑtʃtaʊə(r)]...