碳/氮比率可作为白榆新梢生根的指标。

C/N ratio can be taken as a rooting index of elm tip.

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多罗斯·伊伯特是哈佛地形建筑学的副教授，她指出城市农业是一个在底特律，纽约，密尔沃基还有其他一些国际大都市里日渐生根的趋势。

Dorothee Imbert, associate professor in landscape architecture at Harvard, pointed to urban farming, a trend that has taken root in Detroit, New York, Milwaukee and a handful of international cities.

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它主要通过地下茎传播；当根系统碎片或整个植物漂浮到一个区域并生根，或当种子漂浮到一个合适的区域并发芽时，菌落就形成了。

It spreads primarily by underground stems; colonies form when pieces of the root system or whole plants float into an area and take root or when seeds float into a suitable area and germinate.

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So it's grounded in a historical moment, and we'll come back to this and what that might mean about her perception of God.

它在重要的历史时刻落地生根,让我们回到犹太人对上帝的看法，意味着什么。

耶鲁公开课 - 旧约导论课程节选

Why did an inhumane institution of course not everybody who defended it thought it was inhumane but why did that system survive, persist and grow?

为什么一个不人道的制度,当然不是所有捍卫它的人都觉得不人道,为什么奴隶制度还是会生根,发芽,成长

耶鲁公开课 - 美国内战与重建课程节选