Intercrossing

例句:

• The result would often be greatly retarded by free intercrossing. 查尔斯·达尔文. 物种起源.
• On this principle nurserymen always prefer saving seed from a large body of plants, as the chance of intercrossing is thus lessened. 查尔斯·达尔文. 物种起源.
• Intercrossing with the inhabitants of the surrounding districts, will also be thus prevented. 查尔斯·达尔文. 物种起源.
• Any tendency to modification will also have been checked by intercrossing with the unmodified immigrants, often arriving from the mother-country. 查尔斯·达尔文. 物种起源.
• In some cases the intercrossing of aboriginally distinct species appears to have played an important part in the origin of our breeds. 查尔斯·达尔文. 物种起源.
• It would be necessary, in order to prevent the effects of intercrossing, that only a single variety should be turned loose in its new home. 查尔斯·达尔文. 物种起源.
• Intercrossing will chiefly affect those animals which unite for each birth and wander much, and which do not breed at a very quick rate. 查尔斯·达尔文. 物种起源.
• These varieties would cross and blend where they met; but to this subject of intercrossing we shall soon have to return. 查尔斯·达尔文. 物种起源.

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