正南方，也就是我面前旋转山脉的正上方，是一位英国外交官在1893年勾勒出的巴基斯坦弯曲的边界线。
Due south, directly over the Spin mountain range in front of me, is the crooked line of the Pakistan border, drawn by a British diplomat in 1893.
因为所有对象都是从8字节边界开始，并且大小可以被8整除，所以底部的3位不用于表示大小；我们将其作为标志，用于表示对象的不同状态。
As all objects start on an 8 byte boundary, and the size is divisible by 8, the bottom 3 bits are not used for the size; we use them for flags to indicate different states of the object.
如果要加载自的地址不是一个 16 字节的边界，它就会将该地址的最后四位截断然后再加载，以便使其能够加载。
If it is given an address to load from that is not at a 16-byte boundary, it simply zeroes out the last four bits of the address before loading it so that it will be an aligned load.
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