(1)机遇购买
指在货物买卖合同中，买方购买的是取得标的物的机会。无论买方是否取得标的物,他都必须支付固定的价款。通常的例子如购买彩票，彩票即为买主提供了获得奖品的机会。

(2)预约包购(=emptio rei speratae)

• attempt to evade or defeat tax
• attendance by physician
• attendance centre(s)
• attendance officer
• attendant
• attendant circumstances
• attendant terms
• attending circumstances upon execution of will
• attentare
• attentat
• attentate
• attention
• atterminare
• atterminata,—posita ad talem terminum
• attermine
• Atterminent querentes.
• atterminer
• attermining
• attermoiement
• attest
• attestation
• attestation clause
• attestation of will
• attested copy
• attesting witness