在英语中，左边和右边分别可以用以下术语表示：

left: 左边
right: 右边

例如：

The cat is sitting on the left side of the room. (猫坐在房间的左边。)
The tree is located to the right of the house. (树位于房子的右边。)

注意，在英语中，左边和右边也可以用副词来表示，例如：

The cat is sitting on the left. (猫坐在左边。)
The tree is located to the right. (树位于右边。)

此外，左边和右边还可以用介词短语来表示，例如：

The cat is sitting on the left of the room. (猫坐在房间的左边。)
The tree is located to the right of the house. (树位于房子的右边。)