Simply, companies are always constrained from such growth by one of two constraints.
简单地说，公司总是受到两种约束之一的制约。
2
Its decline is likely to resume but its contribution to rebalanced growth will be constrained if China does not let the yuan appreciate against the dollar.
美元可能会再次贬值，但是如果中国不将人民币对美元汇率上调的话，贬值对再均衡增长的贡献会很有限。
3
The world is confronting population growth, while supply and production is constrained by climate change, water scarcity and lack of technology, especially among smallholder farmers.