3.It's very difficult! but I think it should be "hexad", and "hex" left when we take away the last two letters.
一什么样的五的词,当你拿掉两后还有剩下?
4.The linen micarta handle plates are attached with hex nuts and cover a hollowed tang with compartments for various survival items.
该被服米卡塔处理板附有十进制坚果和涉及掏空唐与隔间,为各种救生物品。
5.Sandhoff results from a genetic mutation that reduces the body's supply of an enzyme, called hexosaminidase ("hex"), used by brain cells to metabolize excess fatty material called lipids.