The most common cylinder head types are the hemi, wedge, and semi-hemi.
最常见的气缸盖类型是半球形，楔形和准半球形。
2
Spatial ability is located in both brain hemi spheres for women but does not have a specific measurable location as it does in males.
空间能力位于女性的左右两个半脑，但是并不像在男性大脑中一样有一个特定的可测量的位置。
3
Grass trees and other biomass feedstocks consist of a mixture of cellulose hemi cellulose and lignin a tough material that helps plants keep their shape.