Of course, their strength and heat resistance are low, restricted range of applications.

当然，它们的强度和耐热性都较低，应用的范围受到限制。

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They are normally restricted to low-skilled jobs, such as catering, cleaning and security.

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It cites graduated driver licensing systems in which teens' abilities to drive are expanded over time from the initial stages, when driving is restricted to low-risk conditions.

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Abundant supplies of low cost energy rather than restricted supplies of high cost energy would replace another, effective, crippling tax increase with an effective pro-growth tax cut.

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