Adjusting public perceptions to suit a far less lethal virus has been problematic.

调整公众对远没有那么致命病毒的看法一直是个问题。

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He said poor attendance at the centre's cinemas since March has been problematic.

BBC: Leicester digital arts centre 'needs cash boost'

While flexible and stretchable electronics have been on the rise, powering them with equally stretchy energy sources has been problematic.

BBC: Stretchy battery drawn to three times its size

When performance is good, funds are reluctant to terminate a manager that has been problematic in other areas such as client servicing.

FORBES: Time��s Running Out For America��s Pensions (May 1, 2003 )