I assume the tariff rate quota that limits China's exports of hybrids and plug in hybrids will be…

I assume the tariff rate quota that limits China's exports of hybrids and plug in hybrids will be binding -- and the "understanding" is that China's won't retaliate for a quota that preserves some fraction of their current exports. 引用 @jojjeols：The problem with "understandings" are that they are no