硬度

硬 = 更 + 石 : Maud Younger (y) finds the snake which ate too much (更) in the engine's bathroom ((e)ng4), and it feels miserable. To make the snake feel better Maud massages the snake using two warm stones (石). As Maud massages the snakebshe finds that the snake's belly is really hard (硬).

度 = 又 + 广 + 廿 : Mnemonic symbol: a thermometer.

度 = 又 + 广 + 廿 : Doggy Dog follows a rigid training plan in the space station's bathroom to spend his time, even though he is sick and has a fever. To measure the degree of intensity of his fever, he uses a thermometer to measure his temperature. Even while doing this he still boxes a flower pot (which he suspended from a parachute) with his boxing glove.