The perfect molding must have unity and variety, so "unity and variety" is the rule that the tractor molding design have to observe.

完美的造型必须具有统一性与变化性，因此“统一与变化”是拖拉机造型设计中必须遵循的法则。

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The rule of quantitative change and qualitative change is one of the basic laws in Dialectical Materialism, and it suggests that substance is an unity of some quality with some quantity.

量变质变规律是唯物辩证法的基本规律之一，它表明任何事物都是一定的质和一定的量的统一体。

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Multi-word units are dynamic and open to many choices of lexis in a specific grammatical structure and form a unity of semantic meaning, grammatical rule and pragmatic context.

多词单位在一定的语法结构内可供词语选择的空间很大，具有开放性和动态性，形成了语义、语法和语境的结合体；

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The irony of this outburst was not lost on the Iraqi Kurds, who were long shunned by Turkey because their experiment with self-rule seemed a threat to Turkish unity.

ECONOMIST: Turkey��s Kurds

We will engage as partners as the Libyan people work to build open and transparent institutions, establish security and the rule of law, advance opportunity, and promote unity and national reconciliation.

WHITEHOUSE: Statement by the President on Libya

Barak said he would not rule out the possibility that he would join a so-called unity government under Sharon to avert political fighting that is now likely in the Israeli parliament, or Knesset.

CNN: Sharon claims victory in Israeli election