The pine wood nematode (Bursaphelenchus xylophilus), a tiny worm less than 0.1 millimeters long, was carried from North America to Japan, from where it spread to Taiwan and on into mainland China.
一種長度○．一公分不到的線蟲，從北美洲被帶到日本，又轉到台灣，直驅大陸。