The Spring Framework (see Resources) has been EJB's major competitor in the enterprise space for the last few years.
过去数年来，SpringFramework(参见参考资料)一直是EJB在企业领域的主要竞争对手。
It is seen as a major competitor to not only the iPhone platform but Microsoft's Windows Mobile and Nokia's Symbian.
不仅仅是iPhone平台，对于微软的Windows和诺基亚的Symbian平台，它都被视为最主要的竞争对手。
Coal, another major competitor of renewables, remains expensive and is facing increasing scrutiny over environmental concerns.
煤炭，可再生能源的另一个主要竞争者，仍然很昂贵，并且正面临着日益增加的与环境有关的仔细检查。
Coal, another major competitor of renewables, remains expensive and is facing increasing scrutiny over environmental concerns.
煤炭，可再生能源的另一个主要竞争者，仍然很昂贵，并且正面临着日益增加的与环境有关的仔细检查。
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