难预测的 meaning in English

incalculable

Wireless communication provides flexible and efficient services than fixed phones , while harder to research
实际上,移动无线信道是通信中难预测的通信信道之一。
Those who have raised objection to the concept are concerned about the possible wastage of land resource and the possible unfair competition with private land owners
支持者认为土地储备可为较难预测的土地需要，提供灵活及适时的支援。反对者则担心会浪费土地资源，及引起不公平竞争。
However , there are some characteristics in ship investment , such as high vessel value , long recover period , many uncertain factors , which lead ship investor to face many kinds of risk under complicated international shipping market situation
船舶价格昂贵，投资回收期长，不确定影响因素多等特点，使船舶投资在国际航运市场复杂多变的情况下面临许多风险，这些风险往往是难预测的。