The EST isoenzyme analysis of samples from all these three sourees showed only one enzyme band without marked difference in mobility.

的样品EST同功酶均显示一条酶带，其位置的差异并不显著。

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It marked the first time he has been outside the heavily fortified Green Zone in Baghdad without being on a military base.

这标志着，第一次他没有在军事基地而是前往一个位于巴格达戒备森严的绿区之外的地方。

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The boundary where the two plates converge is marked by a red line, but even without the line, its location would be revealed by the trench located about 100 kilometers (62 miles) offshore.

两块版块的交界线用红线标示出来，但是即使没有这条红线，我们也可以根据距离海岸100千米(62海里)的那条海沟来辨认。

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His voluntary return to action at an age when he was too old to fly fighter planes and too fat to squeeze into the cockpit without difficulty marked his own escape from his planet B-612.

ECONOMIST: Hunting for Saint-Exup��ry

Dr Lyle Armstrong, at Newcastle University, said that the study "without doubt" marked an advance for the field.

BBC: Embryonic stem cells: Advance in medical human cloning

Saturday's contests marked the first without former Massachusetts Gov. Mitt Romney, who suspended his campaign Thursday.

CNN: McCain gets mixed message; Dems deadlocked after contests