simultaneous是什么意思？

Those simultaneous challenges appear less overwhelming with increasingly better answers to a centuries-old question: how to make power portable.

There should be forces in society who should be concerned about the budget, but they shouldn't be functioning simultaneously as doctors, said Dr.

If there was a greater coordination of technology transfer offices within regions and a simultaneous investment in the scale and functions of our graduate schools, universities could, and should, play a key role in positioning the UK for the next growth cycle.

But with simultaneous interpreting, you start translating almost as soon as the other person starts speaking.

simultaneous interpreting, putting someone's words into another language more or less as they speak, sounds to me like the more difficult.