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ただ， タダ， 只， 唯， 徒， 但， 常
1. ordinary, common, usual
2. free of charge
3. unaffected, as is, safe
4. only, merely, just, simply
5. but, however, nevertheless
但是，尽管如此；通常，一般情况下；免费；只、仅仅
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失敗， しっぱい
1. failure, mistake, blunder
失败
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可能性， かのうせい
1. potentiality, likelihood, possibility, chance
可能性
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懸念， けねん
1. worry, fear, anxiety, concern
担心，担忧，忧虑，惦念