Unwinding the policies of the crisis will involve complex challenges of timing, co-ordination and credibility.

解除危机期间的政策将涉及到时机、协调和可信度方面的复杂挑战。

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This complex compound consists of a co-ordination compound containing a fatty acid residue and at most one RCOO group per two metal atoms.

这一复杂的化合物组成的一个协调化合物含有脂肪酸残渣，最多一个RCOO每两个金属原子组。

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Just as it is only genetically fit peacocks that can grow symmetrical tails with perfectly repeated eyespots, only genetically fit artists, with good muscular co-ordination and perfect vision, can produce accurate repetitions of complex, symmetrical motifs.

ECONOMIST: Come up and see my etchings