外來種生物的來源，依其侵入的途徑可分為以下四種：

外來種生物的來源，依其侵入的途徑可分為以下四種：

結果 (英文) 1:

Source exotic species of organisms, according to their way of invasion can be divided into the following four categories:

結果 (英文) 2:

The sources of alien species can be divided into four categories depending on how they invade:

結果 (英文) 3:

According to the way of invasion, the sources of alien species can be divided into the following four types: