Word
stoma
气孔
核心释义
a tiny pore in a plant's leaf or stem through which gases and water vapor pass
- 1.
叶子或茎表皮上的小孔,气体和水蒸气通过
One of the tiny pores in the epidermis of a leaf or stem through which gases and water vapor pass.
- 2.
叶子或茎上的微小表皮孔,气体和水蒸气可以通过
a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
- 3.
膜上的小开口；尤其是手术构造的开口,如结肠造口术或回肠造口术后的废物排出口；人工肛门
A small opening in a membrane; a surgically constructed opening, especially one in the abdominal wall that permits the passage of waste after a colostomy or ileostomy; an artificial anus.
- 4.
口或类似口的开口(尤其是通过手术在身体表面创建的通向内部器官的开口)
a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
- 5.
类似口的开口,如线虫的口腔
A mouthlike opening, such as the oral cavity of a nematode.
叶子或茎表皮上的小孔,气体和水蒸气通过；叶子或茎上的微小表皮孔,气体和水蒸气可以通过；膜上的小开口；尤其是手术构造的开口,如结肠造口术或回肠造口术后的废物排出口；人工肛门；口或类似口的开口(尤其是通过手术在身体表面创建的通向内部器官的开口)；类似口的开口,如线虫的口腔
用法In use
Under the microscope, we could see a single stoma surrounded by two guard cells.
用法提示：stoma 在此句中指植物叶片表面的气孔。
The plant closes its stomata at night to reduce water loss.
用法提示：stomata 是 stoma 的复数形式，表示多个气孔。
Carbon dioxide enters the leaf through a stoma on the underside.
用法提示：stoma 在这里作可数名词，表示叶片上的微小孔洞。
the stoma
特指已知或唯一的气孔。
The stoma regulates gas exchange in the leaf.
气孔调节叶片中的气体交换。
a stoma
首次提及或泛指。
A stoma is a tiny pore in the leaf surface.
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Dictionary facts from ECDICT, WIKTIONARY.