叶顶端缓尖或急尖并且尖端模糊；冬天芽鳞片提早脱落或有一些仍残留在枝条的基部。
Leaf apex gradually acuminate or abruptly tapered and indistinctly mucronate ; winter bud scales early deciduous or some persistent at base of branch .
卡车在一阵急刹车的刺耳尖啸声中停了下来。
The truck stopped with a screech of brakes .
急尖