negative direction的用法和樣例：
例句
- Peeling in the other direction is awkward.
如果逆向刨就會(huì )很難。 - I hit the switch, and the chimaera reversed direction instantly.
我一打開(kāi)電場(chǎng)，銀鮫馬上逆向而游。 - I'm afraid you're going in the opposite direction.
我恐怕你走反方向了。 - By AC it is meant that the current is flowing first in one direction and then back again.
交流電是指電流先流向一個(gè)方向，然后反方向流動(dòng)。
