caltrops的翻译，读音
释义：
n. 三角钉
n. tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed
n. a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
n. Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America
n. tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed
n. a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
n. Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America