在创造我们民族身份的过程中，种族对于美国人性格和品质的塑造起了至关重要的作用——美国人被定义为“白人”。
Race has functioned as something necessary to the construction of American character and quality in the creation of our national identity—American has been defined as "white".
理查德对本队的成功起了至关重要的作用。
结论微血管的新生对静脉淤血组织的成活，起了至关重要的作用。
Conclusion Nascent capillaries play an important role in the survival of congested tissue.
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