常見例句The presence of scales kept the adelgid's numbers down, which led to less toxin and healthier hemlocks.介殼蟲在與球蚜同棲時(shí)擠掉了部分?jǐn)?shù)量的後者，減少了鉄杉的中毒量及樹木受害的程度。 返回 Adelgid