His invalid father is becoming a burden.
他父亲体弱
, 
他来说渐渐成了累赘。
His invalid father is becoming a burden.
他父亲体弱, 他来说渐渐成了累赘。
His bad health is a great disadvantage for him to get a good paid job.
他体弱他求得一个薪水很高的工
很不利。
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