一种不错的做法是，从512 MB开始，然后逐步向上或向下，以确定最优值、测定吞吐量或响应时间，并分析gc日志，以了解进行清除操作的频率及时间。

A good starting point would be 512mb, then move up or down to determine optimal value, measure throughput or response times, and analyze GC logs to understand frequency and length of scavenges.

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他和同事测定了8000多条鳕鱼的基因型，研究两个鱼群中不同版本的基因，或者说等位基因的频率在1994年至2003年间是如何变化的。

He and his colleagues genotyped more than 8000 fish to find out how the frequency of different versions of the gene, or alleles, changed in the two populations between 1994 and 2003.

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以相差显微镜及成像分析技术测定纤毛运动频率(CBF)。

Ciliary beating frequency (CBF) was measured by phase contrast microscope and videotape analysis.

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