Some metal alloys, such as those based on aluminum, have lowdensities and are used in aerospace applications for fuel economy.
某些金属合金,例如铝基合金,其密度低,可用于航空航天以节约燃料。
2
CD37 is also present, at lowdensities, on resting and activated t cells, neutrophils, monocytes, and some myelomonocytic leukemia cells.
CD 37同样也低密度的存在于静止或活化t细胞,中性粒细胞,单核细胞以及骨髓单核细胞性白血病细胞膜上。
3
However some metals such as aluminum or magnesium have lowdensities and are used in applications that require other metallic properties but also require low weight.