Results for within hours of the launch, translation from English to Indonesian

hours of lessons are empty
jam pelajaran kosong

eiffel tower on the launch what??
pada tanggal berapa menara eiffel di resmikan??

in the european union, laboratory confirmed cases of covid-19 are reported within 24 hours of identification.
di uni eropa, kasus covid-19 terkonfirmasi laboratorium dilaporkan dalam 24 jam setelah identifikasi.

the testing capacity is several hundred samples within hours and therefore much faster than the conventional pcr assay of viral rna.
kapasitas pengujiannya hingga beberapa ratus sampel dalam beberapa jam, jadi jauh lebih cepat daripada pemeriksaan pcr konvensional terhadap rna virus.

in the first hour of school i studied crafts
di jam ketiga saya belajar ipa