If a plant has spotted or crinkled leaves, do not use it for propagation.
如果植物的葉子有斑點或者萎縮，就不要用來繁殖。
柯林斯例句
Rose propagation has a long and rich history.
玫瑰繁殖有著悠久的歷史。
辭典例句
Such rootstocks or cultivars were reproduced true to type by vegetative propagation.
這些鉆木和品種,通過無性繁殖長成和親本一樣的類型.
辭典例句
It is the reverse of the propagation step in addition polymerization.
這一過程是加聚反應(yīng)歷程中鏈增長步序的逆過程.
辭典例句
Efficient methods of vegetative propagation and improved screening techniques are also required.
高效率的無性繁殖法和改良的鑒定技術(shù)也屬必需.
辭典例句
So far we have described the propagation of alternating magnetic fields.
至此我們討論了交變磁場的傳播.
辭典例句
Crack propagation usually begins slowly.
裂紋的增長常常是開始緩慢.
辭典例句
We first take up the subject of optic ray propagation through a variety of optical media.
首先研究光束通過各種光學(xué)介質(zhì)的傳播問題.
辭典例句
Clonal propagation can also give some large gains in a relatively short time.
繁殖無性系也可以在較短期間內(nèi)提供較大的增益.
辭典例句
Diseases spread by insects are encouraged when climatic conditions propagation of the vector.
當(dāng)氣候條件適于媒介昆蟲繁殖時,由昆蟲傳播的疾病即行蔓延.
辭典例句
The method is a direct simulation of the actual process of radiation propagation.
這種方法是輻射傳輸實際過程的直接模擬.
辭典例句
Also, the idea of progress and its enthusiastic propagation may have some effect.
還有, 進步觀念及其熱烈宣傳也會產(chǎn)生某種效果.
辭典例句
A complete study of the propagation of shock waves in elastic solids is presently lacking.
關(guān)于彈性固體中沖擊波的傳播,目前還缺少全面的研究.
辭典例句
The simplest explanation of aberration is the analogy of light propagation to the fall of raindrops.
對光行差的最簡單的解釋,是把光的傳播同雨點的下落作類比.
辭典例句
Propagation of virus in embryonating eggs was first used by Goodpasture and Woodruff in 1931.
1931年Goodpasture和Woodruff首次應(yīng)用雞胚培養(yǎng)病毒.
辭典例句
They found that the principal requirement for what is called global cascades 一 the widespread propagation of influence through networks 一 is the presence not of a few influentials but, rather, of a critical mass of easily influenced people.
2010年考研真題（英語一）閱讀理解 Section Ⅱ