index; index number; exponent (e.g. in floating-point representation); characteristic
index; indices; indicator
number of long thin objects (movies, TV programs, baseball games, etc.) (programmes)
price; cost; value; worth; value
rate; ratio; proportion; percentage
double; twice (as much); times (as much); -fold; 1-nth; 1 to n
book; volume; this; present; main; head
five times (as much); quintuple; fivefold
not only ... (but also); not just; as well as
tongue; tongue-like object; clapper (of a bell); talon (of a lock)
inner part; inside; interior; depths (e.g. of a forest); back (of a house, drawer, etc.); bottom (e.g. of one's heart)
esophagus; gullet; esophageal
entrance; entry; gate; approach; mouth
in short; in a word; to sum up; to put it simply; to make a long story short; after all
place; spot; address; district; area; one's house; point
literally; self-explanatorily
to talk; to chat; to chatter
to return to normal; to revert to the starting point; to go back to how it was
time; hour; period; class
another person; other people; unrelated person (i.e. not related by blood); outsider; stranger
direction; way; side (of an argument, etc.); one's part; type; category; field (of study, etc.)
carcinogen; carcinogenic substance
to contain; to comprise; to hold in the mouth; to bear in mind; to understand; to express (emotion, etc.)
investigation; examination; inquiry; enquiry; survey
spouse; wife; husband; partner
double; twice (as much); twofold
passive smoking; second-hand smoking
Europe and America; the West
indoor (court, pool, etc.)
foreign; abroad; overseas
severe; strict; hard (to do); difficult; intense (e.g. cold); harsh (weather)
separation of smoking and non-smoking areas
to advance; to go forward; to precede; to go ahead (of); to make progress; to improve; to deepen
still; much more; (not) yet; still a long way to go; still a long way off; not there yet
falling far short (of); being far behind; being far inferior (to); being no match (for)