We've confirmed that your account,

We've confirmed that your account, weihai12, is currently unable to participate in trading.

You are on a trading cooldown because you cancelled trades that were pending or in a trade hold.
Once you accept a trade offer it is important to let it complete and to only cancel if you realize you have been trade scammed or deceived in some way. Cancelling trades just because you've changed your mind or because you don't want to wait for the trade hold makes it hard for others to have confidence in trade offers.
Cooldowns for cancelling accepted trades last for 7 days.
This restriction will expire in 0 days, 2 hours and 40 minutes.
Steam Support is unable to remove or change the duration of your cooldown.

結果 (中文) 1:

我们已经确认您的帐户，weihai12，是目前不能参与交易。你在交易的冷却时间，因为你取消的交易都挂起或贸易手中。一旦你接受它是重要的是让它完成并只取消如果你意识到你已经被骗或以某种方式欺骗的贸易的贸易优惠。取消交易，只是因为你改变了你的想法或者因为你不想等待，贸易将很难对其他人有信心，在贸易中提供。为取消冷却接受交易最后 7 天。这一限制将在 0 天 2 小时 40 分钟过期。蒸汽的支持是无法删除或更改您的冷却时间的持续时间。

結果 (中文) 3:

我们确认您的帐户，weihai12，目前无法参与交易。你是在一个交易的冷却时间，因为你取消了正在等待或在一个贸易。一旦你接受了一个贸易提供重要的是让它完整，只有取消如果你意识到你已经被骗被骗或以某种方式贸易。取消交易只是因为你改变了你的想法，或者因为你不想等待交易，这使得其他人很难有信心在贸易上提供。冷却时间取消接受交易持续7天。这个限制将在0天，2小时和40分钟届满。蒸汽支持是无法删除或改变你的冷却时间。