单词
subtend
英 [sʌb'tend]
美[səb'tɛnd]
基本信息
- vt. 对向;包在叶腋内
词态变化
第三人称单数: subtends;过去式: subtended;过去分词: subtended;现在分词: subtending;
中文词源
subtend 对向弧,对向角
sub-,在下,向上,-tend,延展,词源同 tend,extend.用于几何学术语指对向弧,对向角。
英文词源
- subtend (v.)
- 1560s, from Latin subtendere "to stretch underneath," from sub "under" (see sub-) + tendere "to stretch" (see tenet). Related: Subtended; subtending.
双语例句
- 1. In the daisy family the numerous bracts which subtend the inflorescence are known as an involucre.
- 在菊科植物中,苞片数目多而聚生在花序外围,称为总苞.
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subtend相关单词