Longer distance constraints are determined by site-directed spin labelling electron paramagnetic resonance, but current labelling strategies still constitute some limitation.
直接位点标记的旋转电子顺磁共振可以得到更长的距离约束数据，但是目前的标记策略仍然具有局限性。
In addition, based on a semantic syntax-directed translation from pure patterns to distorted patterns, a distance measure including both semantics and syntax is proposed.
这里既考虑模式的统计特征，又通过词意、句法指导下的变换来描写畸变模式的结构。
Having rested a while, I directed my servant to inquire the way to the village; and, with great fatigue to our beasts, we managed the distance in some three hours.
休息了一会，我叫我的仆人去打听到林里的路，于是，旅途的跋涉使我们的牲口劳累不堪，我们在三个钟头左右就到了。
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