I don't like "indispensable to communicate". You can say "Great communication skills are indispensable when communicating with people from abroad", but the "communication ... communicating" repetition makes the sentence seem a bit weak.
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I don't like "indispensable to communicate". You can say "Great communication skills are indispensable when communicating with people from abroad", but the "communication ... communicating" repetition makes the sentence seem a bit weak.