促使适当的迭代要用灵活性和信赖，以及主题领域和方法经验。
It takes flexibility and trust, as well as subject domain and methodology experience, to induce proper iterations.
经验表明，详细描述的主题空间要比简单扼要的空间更可取。
Experience has shown that a more verbose topic space is preferable to a terse, less descriptive space.
这部作品主题严肃，出自经验丰富的职业传记作家莱希特之手。
Mr Lycett's book is a serious piece of work from an experienced professional biographer.
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