24381.in the middle of(～の最中）
I'm in the middle of planning one.
24382.think of(考えている）
I'm think of going to sushi restaurant in the Hotel Neｗ Onishi.
24383.essential(絶対に必要な、必要不可欠な）extremely important and necessary
Lots of fruits and vegetable are essential for healthy living.
24384.vital(必要不可欠） extremely important and necessary for something to succeed or exist 類義語 crucial
Your presence is vital for the survival of this company.
24385.key(カギ、カギを握る） very important or necessary
Decision-making is a key skill all leaders need.
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