关于

about; regarding; on; for; in; with; to; of; into; after; over; towards; concerning; respecting; re; touching; -wise; thereto; bout; concern; relate; relate to; pertain; pertain to; be about; involve; regard; refer to; deal with; appertain to; relative to; be-; with respect to; pertaining to; in relation to; as for; in regard to; with regard to; in terms of; in the way of; in reference to; with reference to; as regards; in respect of; as far as is concerned

合作

cooperation; tie-up; teamwork; collaboration; partnership; cooperate; team; collaborate; interact; play along; team up; cooperative; collaborative; joint; concerted; cooperatively; jointly; together; in collaboration; in partnership; in concert

作文

composition; theme; essay; paper; write an essay; compose a written piece; do a composition