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- upper photic zone 上透光层
- Most marine plants can live only in the photic zone. 海洋植物多半只能生活在透光层里。
- It is generally assumed that the photic zone extends to the depth at which the light intensity is reduced to 1% of the value at the surface. 通常认为光照带伸展到光强度降低为表面值为1%25的深度。
- The surface photic zone, where light can penetrate, contains phytoplankton and zooplankton. 表面的有光带,即光可以透过的地方,含有浮游植物和浮游动物。
- Three of the main environmental factors that vary across deep-sea ecosystems are temperature, water depth and carbon inflow from the photic zone. 三个主要环境因素:在跨深海域变化的生态环境里,温度,水深和从头光层来的碳的流入。
- Most marine plants can live only in the photic zone 海洋植物多半只能生活在透光层里。
- Tears are secreted by an organ under the upper eyelid. 眼泪由上眼睑下面的器官分泌。
- Assessing Secchi and Photic Zone Depth in the Baltic Sea from Satellite Data 利用卫星数据估算波罗的海的透明度和透光层深度
- I'd like a room on the upper level. 我想要楼上的房间。
- My hometown is in the upper reaches of the river. 我的家乡在这条河的上游地区。
- He locked his diary in the upper drawer. 他把日记锁在上层抽屉里。
- The Norwegians live in a comparatively cold zone. 挪威人生活在比较寒冷的地区。
- He have tattoo the name "marlene" on his upper arm. 他将"玛琳"这个名字刺在臂的上方。
- A band or badge worn around the upper arm. 臂章戴在上臂的绑带或徽章
- A canine tooth of the upper jaw. 上颚犬齿上颚的一个犬齿
- He's between the upper and nether millstone. 他深受上下夹攻。
- This part of town is where the upper class live. 镇上这个地区是上层阶级的人住的。
- He had an infection in the upper respiratory tract. 他上呼吸道感染。
- The Senate is the upper chamber of Congress. 参议院是议会的上院。
- Supplies were parachuted into the earthquake zone. 救援物资已空投到地震区。