外焰是一个汉语词汇，拼音为wài yàn，基本意思是火焰的最外层。
预热烤架，用菜油或是橄榄油刷架子，将牛排放置火外焰烤三分钟。
Heat grill, brush grate with vegetable or olive oil and place steaks over hottest part of fire for 3 minutes.
镁合金热室压铸机所用坩埚在使用3 ~ 4个月后在靠近外焰的底部和侧面结合处发生严重的变形开裂，对开裂原因进行了分析。
After been used for 3-4 months, the crucible had serious crack at the joint of the bottom and side closing to the outer flame.
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