shuō chū lǐyóu yǐngxiǎng hé tìdài fāng'àn zhège shíjiān bùxíng yīnwèi chǎngdì yǐ dìng mǎn说出理由、影响和替代方案:“这个时间不行,因为场地已订满。State the reason, impact, and alternative: 'This time doesn't work because the venue is fully booked.'