le signe plus plus sign加号
plus or minus sign加号或减号;正负号
plus-minus sign正负号
the plus sign正号
plus sign additive sign符号为
PLUS SIGN BELOW下面带有加号
combined plus and minus sign正负复合符号
plus-minus sign of electric current电流正负号
N-COUNT（可数名词） A plus sign is the sign + that is put between two numbers in order to show that the second number is being added to the first. It can also be put before a number to show that the number is greater than zero (+3), and after a number to indicate a number that is more than a minimum number or amount (18+). 加号; 正号