perisperm

/ˈpɛrɪspɜːrm/ /ˈpɛrɪspɝːm/

Meanings

noun

珠被外层, 外胚乳

The layer of nutritive tissue, derived from the nucellus, that surrounds the embryo of a seed in some angiosperms.

Examples :

"The black pepper seed contains a significant amount of perisperm, which provides extra nutrients to the developing seedling. "

黑胡椒的种子含有大量的珠被外层 (外胚乳)，为幼苗的发育提供额外的营养。

Related Words

significant noun

/sɪɡˈnɪ.fɪ.kənt/

象征，标志，意义。

"The teacher's smile was a significant of approval for my hard work. "

老师的微笑是对我努力工作的一种认可的象征。

surrounds verb

/səˈraʊndz/

包围，围绕。

"The tall fence surrounds the playground, keeping the children safe. "

高高的栅栏包围着操场，保护孩子们的安全。

developing verb

/dɪˈvɛləpɪŋ/

发展，进展

"The students are developing their reading skills in their English class. "

学生们正在英语课上发展他们的阅读能力。

provides verb

/pɹəˈvaɪdz/

供养，赡养。

"It is difficult to provide for my family working on minimum wage."

靠最低工资养家糊口很难。

tissue noun

/ˈtɪsjuː/ /ˈtɪʃu/

薄纱，绢。

"The delicate tissue paper wrapped the fragile antique doll. "

包裹着易碎古董娃娃的是精致的薄纱纸。

contains verb

/kənˈteɪnz/

包含，包括，含有

"The box contains my old toys. "

这个盒子里装着我以前的玩具。

nutrients noun

/ˈnuːtriənts/ /ˈnjuːtriənts/

营养物质, 养分.

"The vegetables provided many essential nutrients for the growing children. "

这些蔬菜为成长中的孩子们提供了许多必需的营养物质。

derived verb

/dɪˈɹaɪvd/

获得，取得，源于。

"The student derived the answer to the math problem from the formula. "

这个学生从公式推导出了这道数学题的答案。

nucellus noun

/njuːˈsɛləs/ /nuːˈsɛləs/

珠心

"The scientist carefully dissected the ovule to examine the nucellus, the protective tissue surrounding the developing plant embryo. "

科学家小心地解剖了胚珠，以检查珠心，这个保护着正在发育的植物胚胎的组织。

nutritive noun

/ˈnjuːtɹətɪv/

营养品，滋养物。

"A balanced diet provides the body with all the nutritives it needs to function properly. "

均衡的饮食能为身体提供所有必需的营养品，从而保证身体正常运转。

seedling noun

/ˈsiːdlɪŋ/

幼苗，树苗

"The gardener carefully transplanted the tomato seedling into a larger pot. "

园丁小心地把番茄幼苗移植到了一个更大的花盆里。

angiosperms noun

/ˈændʒiəˌspɜːrmz/ /ˈændiˌoʊˌspɜːrmz/

被子植物，显花植物。

"The apple tree, like all flowering plants, belongs to the group of plants called angiosperms. "

像所有显花植物一样，苹果树属于一个叫做被子植物的植物类群。