1. The evergreen tree symbolizes strength and perseverance and is characterized by needlelike leaves. 常青树象征力量和坚持,且以针叶为特征。
2. needlelike leaves usually present on seedlings and young trees, decussate or in whorls of 3, ascending, 4-8 mm, apex acuminate; 针状叶通常在幼苗上提出和幼树,交互对生或者3轮生,上升,4-8毫米,先端渐尖;
3. The extreme thinness of graphene could also lead to more efficient field emitters—needlelike devices that release electrons in the presence of strong electric fields. 另外石墨薄膜厚度极薄,也可做成效率更高的场射极,也就是在强电场中可发射电子的针型装置。