祖母: father's mother, paternal grandmother...
签订: to agree to and sign (a treaty etc)...
临床: clinical...
肥料: fertilizer, manure...
口令: oral command, a word of command (used in drilling troops or gymnasts), password (used by sentry)...
资助: to subsidize, to provide financial aid, subsidy...
对称: symmetry, symmetrical...
