Therefore, the true origin of any piece of wood packing material is difficult to determine and thus its phytosanitary status cannot be ascertained. 因此,所有木质包装材料的真实原产地难以确定,从而使其植物检疫状况也不能确定。
Our country's port inspection and quarantine services intercepted pinewood nematode in wood packing materials from the U. S. and Japan for many times. 我国的口岸检验检疫机关从来自美国和日本的木质包装中多次截获到松材线虫。