Во-первых, если страны будут объеди

Во-первых, если страны будут объединяться против преступности, вести совместные действия против, например, террористических группировок, то, возможно, преступности станет меньше.
Во-вторых, страны должны усилить охрану своих границ, проверять всех тех, кто въезжает в страну, ограничивать доступ некоторым гражданам других стран.

Результаты (английский) 1:

Firstly, if the country will unite against crime, to conduct joint operations against terrorist groups, for example, it's possible that the crime will become less.Secondly, countries should strengthen the protection of its borders to check all those entering the country, restrict certain nationals of other countries.

Результаты (английский) 2:

Firstly, if the countries are to unite against crime, to conduct joint operations against, for example, terrorist groups, it is possible that crime will be less.
Second, countries need to strengthen the protection of its borders, to check all those entering the country, restrict Access to some citizens of other countries.

Результаты (английский) 3:

first, if countries are to unite against crime, to joint action against, for example, terrorist groups, may be less crime. secondly,the country should strengthen the protection of its borders, to all those who enter the country to restrict access to certain nationals of other countries.